From unknown Sun Jun 22 11:42:48 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74281: 30.0.91; font-lock mode hangs on scrolling large Scheme file Resent-From: Divya Ranjan Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 09 Nov 2024 16:06:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: report 74281 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: 74281@debbugs.gnu.org X-Debbugs-Original-To: bug-gnu-emacs@gnu.org Received: via spool by submit@debbugs.gnu.org id=B.173116830810054 (code B ref -1); Sat, 09 Nov 2024 16:06:01 +0000 Received: (at submit) by debbugs.gnu.org; 9 Nov 2024 16:05:08 +0000 Received: from localhost ([127.0.0.1]:54119 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1t9nxS-0002c3-BR for submit@debbugs.gnu.org; Sat, 09 Nov 2024 11:05:08 -0500 Received: from lists.gnu.org ([209.51.188.17]:60076) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1t9nxO-0002bV-2l for submit@debbugs.gnu.org; Sat, 09 Nov 2024 11:05:04 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1t9nxL-0004Pd-IL for bug-gnu-emacs@gnu.org; Sat, 09 Nov 2024 11:05:00 -0500 Received: from latitanza.investici.org ([82.94.249.234]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1t9nxG-0005Wb-KN for bug-gnu-emacs@gnu.org; Sat, 09 Nov 2024 11:04:59 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=subvertising.org; s=stigmate; t=1731168259; bh=UDndg1HlxbTk2IWkd543QkBbs0qsxbJ4e+AJtvRcVDw=; h=From:To:Subject:Date:From; b=F2hAY6ioq+yUbRwKZZovirsM8SP/pgEQae7yVzU8tdiGJvdk0JJE5xOGJvsw7B641 v23RZZythmB4p5ycdnGU09y/mOVB8CwUmdFiQJR6+8r2hEfd0dqryHlspJKTmkw5Uf fS7NT1pFdVYgvepdVua8ltsgLqiwWintc4k5Z/PM= Received: from mx3.investici.org (unknown [127.0.0.1]) by latitanza.investici.org (Postfix) with ESMTP id 4Xm0xH4VzYzGp4F for ; Sat, 9 Nov 2024 16:04:19 +0000 (UTC) Received: from [82.94.249.234] (mx3.investici.org [82.94.249.234]) (Authenticated sender: divya@subvertising.org) by localhost (Postfix) with ESMTPSA id 4Xm0xG6wGQzGp4R for ; Sat, 9 Nov 2024 16:04:18 +0000 (UTC) From: Divya Ranjan Date: Sat, 09 Nov 2024 16:04:13 +0000 Message-ID: <8734k0cs1u.fsf@subvertising.org> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=82.94.249.234; envelope-from=divya@subvertising.org; helo=latitanza.investici.org X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Spam-Score: -1.4 (-) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -2.4 (--) 1. 11ikjlkjkkkj 1. In emacs -Q, open a fairly big Scheme file (> 70k) and try to move in the file with C-n, C-f or mouse scrolling. It sverely lags for several seconds, doesn=E2=80=99t even respond to C-g. 2. Toggle font-lock-mode off through M-x, then try to scroll. It works as expected, no serious lags. 3. Running the profiler also shows font-lock as the culprit. This makes working on big projects, in my case the source code of GNU Guix distribution an impossible situation. I haven=E2=80=99t tried setting = up (Guile) Scheme with Tree-Sitter, but shouldn=E2=80=99t simple syntax-highlighting be not a serious problem? To try a big Scheme file and reproduce this, open tex.scm in gnu/packages/tex.scm in Guix source tree: https://git.savannah.gnu.org/cgit/guix.git In GNU Emacs 30.0.91 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.41, cairo version 1.18.0) Windowing system distributor 'The X.Org Foundation', version 11.0.12101012 System Description: Guix System Configured using: 'configure CONFIG_SHELL=3D/gnu/store/3jhfhxdf6v5ms10x5zmnl166dh3yhbr1-bash-minimal-5.= 1.16/bin/bash SHELL=3D/gnu/store/3jhfhxdf6v5ms10x5zmnl166dh3yhbr1-bash-minimal-5.1.16/bi= n/bash --prefix=3D/gnu/store/k3vqb6f4ghi2v50zrzh3657dywfkyfc5-emacs-next-30.0.91-= 1.9a1c76b --enable-fast-install --with-cairo --with-modules --with-native-compilation=3Daot --disable-build-details' Configured features: ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG LCMS2 LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 M17N_FLT MODULES NATIVE_COMP NOTIFY INOTIFY PDUMPER PNG RSVG SECCOMP SOUND SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS TREE_SITTER X11 XDBE XIM XINPUT2 XPM GTK3 ZLIB Important settings: value of $EMACSLOADPATH: /home/divya/.config/guix/current/share/emacs/sit= e-lisp:/home/divya/.guix-home/profile/share/emacs/site-lisp:/home/divya/.gu= ix-profile/share/emacs/site-lisp:/run/current-system/profile/share/emacs/si= te-lisp:/gnu/store/k3vqb6f4ghi2v50zrzh3657dywfkyfc5-emacs-next-30.0.91-1.9a= 1c76b/share/emacs/30.0.91/lisp value of $LANG: en_US.utf8 locale-coding-system: utf-8-unix Major mode: Dired/name 452/587 Minor modes in effect: all-the-icons-dired-mode: t erc-notify-mode: t erc-notifications-mode: t erc-track-mode: t erc-track-minor-mode: t erc-ring-mode: t erc-netsplit-mode: t erc-menu-mode: t erc-match-mode: t erc-list-mode: t erc-irccontrols-mode: t erc-move-to-prompt-mode: t erc-readonly-mode: t erc-imenu-mode: t erc-pcomplete-mode: t erc-button-mode: t erc-fill-mode: t erc-stamp-mode: t erc-autojoin-mode: t erc-networks-mode: t gcmh-mode: t global-corfu-mode: t corfu-mode: t global-paren-face-mode: t global-color-identifiers-mode: t global-hi-lock-mode: t hi-lock-mode: t timeclock-mode-line-display: t server-mode: t dirvish-peek-mode: t dirvish-side-follow-mode: t dirvish-override-dired-mode: t dired-hide-details-mode: t consult-org-roam-mode: t org-roam-db-autosync-mode: t winner-mode: t popper-mode: t meow-global-mode: t meow-mode: t meow-motion-mode: t meow-esc-mode: t display-time-mode: t dimmer-mode: t all-the-icons-completion-mode: t marginalia-mode: t vertico-mode: t global-writeroom-mode: t which-key-mode: t smartparens-global-mode: t doom-modeline-mode: t global-auto-revert-mode: t save-place-mode: t savehist-mode: t recentf-mode: t global-hl-line-mode: t global-display-line-numbers-mode: t override-global-mode: t straight-use-package-mode: t straight-package-neutering-mode: t tooltip-mode: t global-eldoc-mode: t show-paren-mode: t electric-quote-mode: t electric-indent-mode: t mouse-wheel-mode: t global-prettify-symbols-mode: t file-name-shadow-mode: t global-font-lock-mode: t font-lock-mode: t blink-cursor-mode: t minibuffer-regexp-mode: t buffer-read-only: t size-indication-mode: t column-number-mode: t line-number-mode: t global-visual-line-mode: t visual-line-mode: t indent-tabs-mode: t transient-mark-mode: t auto-composition-mode: t auto-encryption-mode: t auto-compression-mode: t Load-path shadows: /home/divya/.emacs.d/straight/build/compat/compat hides /gnu/store/5fz4hfsq= gh2rgdz2gxpxsnf6ak2nbsnx-emacs-compat-30.0.0.0/share/emacs/site-lisp/compat= -30.0.0.0/compat /home/divya/.emacs.d/straight/build/compat/compat-pkg hides /gnu/store/5fz4= hfsqgh2rgdz2gxpxsnf6ak2nbsnx-emacs-compat-30.0.0.0/share/emacs/site-lisp/co= mpat-30.0.0.0/compat-pkg /home/divya/.emacs.d/straight/build/compat/compat-macs hides /gnu/store/5fz= 4hfsqgh2rgdz2gxpxsnf6ak2nbsnx-emacs-compat-30.0.0.0/share/emacs/site-lisp/c= ompat-30.0.0.0/compat-macs /home/divya/.emacs.d/straight/build/compat/compat-autoloads hides /gnu/stor= 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meow-visual pcase meow-keypad meow-helpers meow-util meow-keymap meow-face meow-var meow-autoloads undo-fu undo-fu-autoloads ui.el time org-download-autoloads async-autoloads justify-kp justify-kp-autoloads dimmer dimmer-autoloads solaire-mode face-remap solaire-mode-autoloads dashboard dashboard-widgets ffap dashboard-autoloads consult-autoloads orderless orderless-autoloads all-the-icons-completion all-the-icons-completion-autoloads marginalia marginalia-autoloads vertico vertico-autoloads writeroom-mode visual-fill-column writeroom-mode-autoloads visual-fill-column-autoloads which-key which-key-autoloads smartparens advice loadhist thingatpt smartparens-autoloads emojify-autoloads ht-autoloads unicode-fonts unicode-fonts-autoloads ucs-utils-autoloads font-utils-autoloads persistent-soft-autoloads list-utils-autoloads pcache-autoloads doom-modeline doom-modeline-segments doom-modeline-env doom-modeline-core comp comp-cstr warnings comp-run comp-common shrink-path rx f s dash nerd-icons nerd-icons-faces nerd-icons-data nerd-icons-data-mdicon nerd-icons-data-flicon nerd-icons-data-codicon nerd-icons-data-devicon nerd-icons-data-sucicon nerd-icons-data-wicon nerd-icons-data-faicon nerd-icons-data-powerline nerd-icons-data-octicon nerd-icons-data-pomicon nerd-icons-data-ipsicon compat doom-modeline-autoloads shrink-path-autoloads f-autoloads dash-autoloads s-autoloads nerd-icons-autoloads seq-autoloads alert-autoloads finder-inf log4e-autoloads gntp-autoloads rainbow-mode color rainbow-mode-autoloads autorevert filenotify saveplace savehist recentf tree-widget wid-edit hl-line ef-themes ef-themes-autoloads info display-line-numbers edmacro kmacro crux-autoloads use-package-bind-key bind-key easy-mmode all-the-icons-dired-autoloads all-the-icons all-the-icons-faces data-material data-weathericons data-octicons data-fileicons data-faicons data-alltheicons all-the-icons-autoloads use-package-core mu4e-autoloads zenburn-theme-autoloads compat-autoloads jinx-autoloads saveplace-pdf-view-autoloads tablist-autoloads pdf-tools-autoloads guix-emacs use-package-autoloads bind-key-autoloads straight-autoloads cl-extra help-mode straight package browse-url url url-proxy url-privacy url-expand url-methods url-history url-cookie generate-lisp-file url-domsuf url-util mailcap url-handlers url-parse auth-source cl-seq eieio eieio-core cl-macs icons password-cache json map byte-opt gv url-vars cl-loaddefs cl-lib compile text-property-search comint subr-x ansi-osc ansi-color ring bytecomp byte-compile rmc iso-transl tooltip cconv eldoc paren electric uniquify ediff-hook vc-hooks lisp-float-type elisp-mode mwheel term/x-win x-win term/common-win x-dnd touch-screen tool-bar dnd fontset image regexp-opt fringe tabulated-list replace newcomment text-mode lisp-mode prog-mode register page tab-bar menu-bar rfn-eshadow isearch easymenu timer select scroll-bar mouse jit-lock font-lock syntax font-core term/tty-colors frame minibuffer nadvice seq simple cl-generic indonesian philippine cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech european ethiopic indian cyrillic chinese composite emoji-zwj charscript charprop case-table epa-hook jka-cmpr-hook help abbrev obarray oclosure cl-preloaded button loaddefs theme-loaddefs faces cus-face macroexp files window text-properties overlay sha1 md5 base64 format env code-pages mule custom widget keymap hashtable-print-readable backquote threads dbusbind inotify lcms2 dynamic-setting system-font-setting font-render-setting cairo gtk x-toolkit xinput2 x multi-tty move-toolbar make-network-process native-compile emacs) Memory information: ((conses 16 1569808 2032077) (symbols 48 77987 11) (strings 32 393425 106016) (string-bytes 1 17866520) (vectors 16 167276) (vector-slots 8 2824657 579009) (floats 8 2970 25080) (intervals 56 20041 6581) (buffers 992 63)) --=20 Divya Ranjan, Philosophy, Mathematics, Libre Software. From unknown Sun Jun 22 11:42:48 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74281: 30.0.91; font-lock mode hangs on scrolling large Scheme file Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 14 Nov 2024 08:45:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74281 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Divya Ranjan , Stefan Monnier Cc: 74281@debbugs.gnu.org Received: via spool by 74281-submit@debbugs.gnu.org id=B74281.17315738886550 (code B ref 74281); Thu, 14 Nov 2024 08:45:02 +0000 Received: (at 74281) by debbugs.gnu.org; 14 Nov 2024 08:44:48 +0000 Received: from localhost ([127.0.0.1]:44939 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tBVT5-0001hZ-Nl for submit@debbugs.gnu.org; Thu, 14 Nov 2024 03:44:48 -0500 Received: from eggs.gnu.org ([209.51.188.92]:44372) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tBVT3-0001hL-Tp for 74281@debbugs.gnu.org; Thu, 14 Nov 2024 03:44:46 -0500 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tBVSw-0006bD-Ft; Thu, 14 Nov 2024 03:44:38 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=MIME-version:References:Subject:In-Reply-To:To:From: Date; bh=oucMvSyq0rgwGsBb91xaujpdlb3hWEiclHQmu0av3wQ=; b=UP0C8I0xjqRWL8a/FKhT Q1mC4jrJ1bhdXXLaLi61hPyg216FRHi+T6RH9CGnN7V2XdZ5zoYqH2fP3JvXg7B8/WJO/A5mTC0Zj gwlk+kUMa+MRhK1Kdd3eBTnHKkeX0mOErtCO1rJihILERFptJNmZ2+i1+fh9GtcBvAee6l38bWNgV vMJvG8uS+5Wn+Rn5tY9fqRkQaKs3Y2rJNwwILNy1dd7SyQpP2FTFvxDCje0qqUGcbVn4BVlmM2u6Y W/B48W6pqk4kOEMlpk/rKcdybyaBSZ7UCBP4iAmiSkn2mSnNxoporzPI3Eq4s9UU90hJtGZ9Wp+Fo sk4ZYQcjfHXPWg==; Date: Thu, 14 Nov 2024 10:44:27 +0200 Message-Id: <86zfm2jjbo.fsf@gnu.org> From: Eli Zaretskii In-Reply-To: <8734k0cs1u.fsf@subvertising.org> (bug-gnu-emacs@gnu.org) References: <8734k0cs1u.fsf@subvertising.org> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.3 (--) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) > Date: Sat, 09 Nov 2024 16:04:13 +0000 > From: Divya Ranjan via "Bug reports for GNU Emacs, > the Swiss army knife of text editors" > > > 1. In emacs -Q, open a fairly big Scheme file (> 70k) and try to move in > the file with C-n, C-f or mouse scrolling. It sverely lags for several > seconds, doesn’t even respond to C-g. I can only reproduce this with C-p when moving from the end of the file. C-n and C-f are instantaneous here, even though this is an unoptimized build of Emacs 30. > 2. Toggle font-lock-mode off through M-x, then try to scroll. It works > as expected, no serious lags. > > 3. Running the profiler also shows font-lock as the culprit. The profile I measured is below. It seems like the bottleneck is parse-partial-sexp, which means the syntax table scheme-mode-syntax-table might be the immediate suspect. > This makes working on big projects, in my case the source code of GNU > Guix distribution an impossible situation. I haven’t tried setting up > (Guile) Scheme with Tree-Sitter, but shouldn’t simple > syntax-highlighting be not a serious problem? > > To try a big Scheme file and reproduce this, open tex.scm in > gnu/packages/tex.scm in Guix source tree: > > https://git.savannah.gnu.org/cgit/guix.git Stefan, what tools do we have to investigate slowness related to parse-partial-sexp? Or maybe you have suggestions for how to speed up font-lock in this case? Here's the profile I get while moving with C-p through the above file: 1151 66% - ... 1151 66% - command-execute 1151 66% - call-interactively 1151 66% - funcall-interactively 1151 66% - previous-line 1151 66% - line-move 798 45% - line-pixel-height 798 45% - jit-lock-function 798 45% - jit-lock-fontify-now 798 45% - jit-lock--run-functions 798 45% - run-hook-wrapped 798 45% - # 798 45% - font-lock-fontify-region 798 45% - font-lock-default-fontify-region 798 45% - font-lock-fontify-syntactically-region 798 45% - font-lock-default-fontify-syntactically 798 45% parse-partial-sexp 353 20% - line-move-visual 353 20% - vertical-motion 353 20% - jit-lock-function 353 20% - jit-lock-fontify-now 353 20% - jit-lock--run-functions 353 20% - run-hook-wrapped 353 20% - # 353 20% - font-lock-fontify-region 353 20% - font-lock-default-fontify-region 353 20% - font-lock-fontify-syntactically-region 353 20% - font-lock-default-fontify-syntactically 353 20% parse-partial-sexp 585 33% - redisplay_internal (C function) 577 33% - jit-lock-function 577 33% - jit-lock-fontify-now 577 33% - jit-lock--run-functions 577 33% - run-hook-wrapped 577 33% - # 577 33% - font-lock-fontify-region 577 33% - font-lock-default-fontify-region 577 33% - font-lock-fontify-syntactically-region 577 33% - font-lock-default-fontify-syntactically 577 33% parse-partial-sexp 6 0% Automatic GC From unknown Sun Jun 22 11:42:48 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74281: 30.0.91; font-lock mode hangs on scrolling large Scheme file Resent-From: Divya Ranjan Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 14 Nov 2024 09:33:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74281 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Eli Zaretskii Cc: Stefan Monnier , 74281@debbugs.gnu.org Received: via spool by 74281-submit@debbugs.gnu.org id=B74281.173157675215699 (code B ref 74281); Thu, 14 Nov 2024 09:33:01 +0000 Received: (at 74281) by debbugs.gnu.org; 14 Nov 2024 09:32:32 +0000 Received: from localhost ([127.0.0.1]:45056 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tBWDI-000458-7J for submit@debbugs.gnu.org; Thu, 14 Nov 2024 04:32:32 -0500 Received: from devianza.investici.org ([198.167.222.108]:46129) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tBWDG-00044x-Ef for 74281@debbugs.gnu.org; Thu, 14 Nov 2024 04:32:31 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=subvertising.org; s=stigmate; t=1731576742; bh=4ULopup4dfAzjr3ehLFpqTgCgdpKqRBecI8lo2E6B+Q=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=iuRWrUI9EUBhnP2tIc3QVXf74WLMAKXxTjYAe6lbSGxtUugFuOnmiZiAS5X85vC5d D4OIav/4qylRi0nsCOuyDoRAr1Zm/DEsaTFp0GnqQybM9ZksRrQmegfpIQQFuvc+qp Yt+RmsMUnrfG31DRXn6rHKNFF/z7XIBpxsmNSUS0= Received: from mx2.investici.org (unknown [127.0.0.1]) by devianza.investici.org (Postfix) with ESMTP id 4Xpw0k3Gb7z6vH0; Thu, 14 Nov 2024 09:32:22 +0000 (UTC) Received: from [198.167.222.108] (mx2.investici.org [198.167.222.108]) (Authenticated sender: divya@subvertising.org) by localhost (Postfix) with ESMTPSA id 4Xpw0j41HKz6v8q; Thu, 14 Nov 2024 09:32:21 +0000 (UTC) From: Divya Ranjan In-Reply-To: <86zfm2jjbo.fsf@gnu.org> (Eli Zaretskii's message of "Thu, 14 Nov 2024 10:44:27 +0200") References: <8734k0cs1u.fsf@subvertising.org> <86zfm2jjbo.fsf@gnu.org> Date: Thu, 14 Nov 2024 09:32:12 +0000 Message-ID: <87frnu2mar.fsf@subvertising.org> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Spam-Score: -0.7 (/) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -1.7 (-) Hello, Eli Eli Zaretskii writes: >> Date: Sat, 09 Nov 2024 16:04:13 +0000 >> From: Divya Ranjan via "Bug reports for GNU Emacs, >> the Swiss army knife of text editors" >>=20 >>=20 >> 1. In emacs -Q, open a fairly big Scheme file (> 70k) and try to move in >> the file with C-n, C-f or mouse scrolling. It sverely lags for several >> seconds, doesn=E2=80=99t even respond to C-g. > > I can only reproduce this with C-p when moving from the end of the > file. C-n and C-f are instantaneous here, even though this is an > unoptimized build of Emacs 30. I see, well its the latest build of emacs on GNU Guix, so yeah. Which lacki= ng features in particular do you think might be causing this? Regards, --=20 Divya Ranjan, Philosophy, Mathematics, Libre Software. From unknown Sun Jun 22 11:42:48 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74281: 30.0.91; font-lock mode hangs on scrolling large Scheme file Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 14 Nov 2024 10:07:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74281 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Divya Ranjan Cc: monnier@iro.umontreal.ca, 74281@debbugs.gnu.org Received: via spool by 74281-submit@debbugs.gnu.org id=B74281.173157881422149 (code B ref 74281); Thu, 14 Nov 2024 10:07:02 +0000 Received: (at 74281) by debbugs.gnu.org; 14 Nov 2024 10:06:54 +0000 Received: from localhost ([127.0.0.1]:45142 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tBWkX-0005lB-MI for submit@debbugs.gnu.org; Thu, 14 Nov 2024 05:06:53 -0500 Received: from eggs.gnu.org ([209.51.188.92]:46986) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tBWkV-0005ku-4p for 74281@debbugs.gnu.org; Thu, 14 Nov 2024 05:06:51 -0500 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tBWkP-0008Pv-Mb; Thu, 14 Nov 2024 05:06:45 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=MIME-version:References:Subject:In-Reply-To:To:From: Date; bh=aH5y4tX+hLIjEOJgz1b7lzLkabW8SSnJUG23akVSonA=; b=SvAfkhuM6mVJNGWuNvWT hEy6YwgVJLTDBiyMVYdFo2knyO3Btb6TTidVNZTtu8gByYDNgJgot+tWZyn0conoJkUI7a2+rllu2 /wMOs/B4rmwwhHHGF3p0+KrzpJSXZubR9vRzdhd+mkrgLejx6a7QlbED5IY9pCtpyqE5PzxcOzNpl J1eogmQGMC3Kv5SNW7moLsfA97d8cyoRN+Sf0DUkip2YZ2zk4IMkZtNk/d7VWpia5Uqyq5JDzuauz SIUzj8tyY9nWI1mPB33YqJobSPRmPsMZJIT9UHMB6fdrk+LDgfaGv2/AKRLUaR/cykLscQuRFCvLK CsLqpmnpgRXngQ==; Date: Thu, 14 Nov 2024 12:06:41 +0200 Message-Id: <86ldxmjfim.fsf@gnu.org> From: Eli Zaretskii In-Reply-To: <87frnu2mar.fsf@subvertising.org> (message from Divya Ranjan on Thu, 14 Nov 2024 09:32:12 +0000) References: <8734k0cs1u.fsf@subvertising.org> <86zfm2jjbo.fsf@gnu.org> <87frnu2mar.fsf@subvertising.org> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.3 (--) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) > From: Divya Ranjan > Cc: Stefan Monnier , 74281@debbugs.gnu.org > Date: Thu, 14 Nov 2024 09:32:12 +0000 > > Hello, Eli > > Eli Zaretskii writes: > > >> Date: Sat, 09 Nov 2024 16:04:13 +0000 > >> From: Divya Ranjan via "Bug reports for GNU Emacs, > >> the Swiss army knife of text editors" > >> > >> > >> 1. In emacs -Q, open a fairly big Scheme file (> 70k) and try to move in > >> the file with C-n, C-f or mouse scrolling. It sverely lags for several > >> seconds, doesn’t even respond to C-g. > > > > I can only reproduce this with C-p when moving from the end of the > > file. C-n and C-f are instantaneous here, even though this is an > > unoptimized build of Emacs 30. > > I see, well its the latest build of emacs on GNU Guix, so yeah. Which lacking features in particular do you think might be causing this? I don't understand the question: I thought I pointed at the possible cause by mentioning syntax-directed font lock? From unknown Sun Jun 22 11:42:48 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74281: 30.0.91; font-lock mode hangs on scrolling large Scheme file Resent-From: Divya Ranjan Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 14 Nov 2024 11:10:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74281 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: 74281@debbugs.gnu.org, eliz@gnu.org Cc: monnier@iro.umontreal.ca X-Debbugs-Original-To: bug-gnu-emacs@gnu.org, Eli Zaretskii X-Debbugs-Original-Cc: monnier@iro.umontreal.ca, 74281@debbugs.gnu.org Received: via spool by submit@debbugs.gnu.org id=B.1731582600967 (code B ref -1); Thu, 14 Nov 2024 11:10:02 +0000 Received: (at submit) by debbugs.gnu.org; 14 Nov 2024 11:10:00 +0000 Received: from localhost ([127.0.0.1]:45256 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tBXjc-0000FX-8v for submit@debbugs.gnu.org; Thu, 14 Nov 2024 06:10:00 -0500 Received: from lists.gnu.org ([209.51.188.17]:51580) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tBXjZ-0000FM-FD for submit@debbugs.gnu.org; Thu, 14 Nov 2024 06:09:57 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tBXjY-0006sT-Pt for bug-gnu-emacs@gnu.org; Thu, 14 Nov 2024 06:09:57 -0500 Received: from devianza.investici.org ([198.167.222.108]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tBXjX-0001dL-4k; Thu, 14 Nov 2024 06:09:56 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=subvertising.org; s=stigmate; t=1731582592; bh=CvyfPDp1nkxwpwnrv5UMuiozo/sjNDePW6kyqhpMZWw=; h=Date:From:To:CC:Subject:In-Reply-To:References:From; b=mXZVCdrpP0QoLhZDRx/tIhldicQeZdJ2d1pXWuKthOIcG3mZEGbCK4a5mre0yg7v3 rec2Zs5YtTHP1myAGvMs2dDmxAvkBT3iX9VlZCTQ94v14eHU7NQg+R2f1l9XOPbVJQ /8RgvrnVgk3ZRcwcpr8KUJnWhGAd7nvktfU9k3nA= Received: from mx2.investici.org (unknown [127.0.0.1]) by devianza.investici.org (Postfix) with ESMTP id 4Xpy9D6Jc2z6vFd; Thu, 14 Nov 2024 11:09:52 +0000 (UTC) Received: from [198.167.222.108] (mx2.investici.org [198.167.222.108]) (Authenticated sender: divya@subvertising.org) by localhost (Postfix) with ESMTPSA id 4Xpy9D0ybTz6v2Q; Thu, 14 Nov 2024 11:09:51 +0000 (UTC) Date: Thu, 14 Nov 2024 11:09:41 +0000 From: Divya Ranjan User-Agent: Thunderbird for Android In-Reply-To: <86ldxmjfim.fsf@gnu.org> References: <8734k0cs1u.fsf@subvertising.org> <86zfm2jjbo.fsf@gnu.org> <87frnu2mar.fsf@subvertising.org> <86ldxmjfim.fsf@gnu.org> Message-ID: <4127F2A6-D61A-4B77-9172-16861383B73C@subvertising.org> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary=----AEHSK0JDD6QH7W6ZWHOXDT8WGBM7QF Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=198.167.222.108; envelope-from=divya@subvertising.org; helo=devianza.investici.org X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Spam-Score: -1.4 (-) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -2.4 (--) ------AEHSK0JDD6QH7W6ZWHOXDT8WGBM7QF Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable > I don't understand the question: I thought I pointed at the possible caus= e by mentioning syntax-directed font lock? I meant you said the emacs build is "unoptimized", what can be optimized? Regards, On 14 November 2024 10:06:41 GMT, Eli Zaretskii wrote: >> From: Divya Ranjan >> Cc: Stefan Monnier , 74281@debbugs=2Egnu= =2Eorg >> Date: Thu, 14 Nov 2024 09:32:12 +0000 >>=20 >> Hello, Eli >>=20 >> Eli Zaretskii writes: >>=20 >> >> Date: Sat, 09 Nov 2024 16:04:13 +0000 >> >> From: Divya Ranjan via "Bug reports for GNU Emacs, >> >> the Swiss army knife of text editors" >> >>=20 >> >>=20 >> >> 1=2E In emacs -Q, open a fairly big Scheme file (> 70k) and try to m= ove in >> >> the file with C-n, C-f or mouse scrolling=2E It sverely lags for sev= eral >> >> seconds, doesn=E2=80=99t even respond to C-g=2E >> > >> > I can only reproduce this with C-p when moving from the end of the >> > file=2E C-n and C-f are instantaneous here, even though this is an >> > unoptimized build of Emacs 30=2E >>=20 >> I see, well its the latest build of emacs on GNU Guix, so yeah=2E Which= lacking features in particular do you think might be causing this? > >I don't understand the question: I thought I pointed at the possible >cause by mentioning syntax-directed font lock? > > > Divya Ranjan, Mathematics, Philosophy and Libre Software ------AEHSK0JDD6QH7W6ZWHOXDT8WGBM7QF Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
> I don't understand the ques= tion: I thought I pointed at the possible cause by mentioning syntax-direct= ed font lock?

I meant you said the emacs build is "unoptimized", wha= t can be optimized?

Regards,


On 14 November 2024 10:06:41 GMT, Eli Zaretskii <= eliz@gnu=2Eorg> wrote:
From: Divya Ranjan <divya@subvertising=2Eorg>
Cc: S=
tefan Monnier <monnier@iro=2Eumontreal=2Eca>,  74281@debbugs=2Egnu=2E=
org
Date: Thu, 14 Nov 2024 09:32:12 +0000

Hello, Eli

Eli Z=
aretskii <eliz@gnu=2Eorg> writes:

Date: Sat, 09 Nov 2024 16:04:13 +0000
From: Divya Ra= njan via "Bug reports for GNU Emacs,
the Swiss army knife of text edito= rs" <bug-gnu-emacs@gnu=2Eorg>


1=2E In emacs -Q, open a fai= rly big Scheme file (> 70k) and try to move in
the file with C-n, C-f= or mouse scrolling=2E It sverely lags for several
seconds, doesn=E2=80= =99t even respond to C-g=2E

I = can only reproduce this with C-p when moving from the end of the
file= =2E C-n and C-f are instantaneous here, even though this is an
unoptim= ized build of Emacs 30=2E

I see= , well its the latest build of emacs on GNU Guix, so yeah=2E Which lacking = features in particular do you think might be causing this?

I don't understand the question: I thought I po= inted at the possible
cause by mentioning syntax-directed font lock?
=


Divya Ranjan, = Mathematics, Philosophy and Libre Software
------AEHSK0JDD6QH7W6ZWHOXDT8WGBM7QF-- From unknown Sun Jun 22 11:42:48 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74281: 30.0.91; font-lock mode hangs on scrolling large Scheme file Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 14 Nov 2024 11:43:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74281 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Divya Ranjan Cc: monnier@iro.umontreal.ca, 74281@debbugs.gnu.org Received: via spool by 74281-submit@debbugs.gnu.org id=B74281.17315845597232 (code B ref 74281); Thu, 14 Nov 2024 11:43:02 +0000 Received: (at 74281) by debbugs.gnu.org; 14 Nov 2024 11:42:39 +0000 Received: from localhost ([127.0.0.1]:45319 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tBYFD-0001sa-FV for submit@debbugs.gnu.org; Thu, 14 Nov 2024 06:42:39 -0500 Received: from eggs.gnu.org ([209.51.188.92]:39078) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tBYFB-0001sN-Sw for 74281@debbugs.gnu.org; Thu, 14 Nov 2024 06:42:38 -0500 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tBYF4-0002uV-Vu; Thu, 14 Nov 2024 06:42:31 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=dxHgjbFY42Lrq1Cg/2BOtQ89mCgZdO+cBb4MD8LtlZU=; b=PXYsr+0k3R4Z yq1y531yCr9jydLCMXxVMaur+M1E6ER0ZxZBoGqLTQkhuji6UtYtDXTalW+yqCru0yHLIyIA4ChQW l50MbfwwKx+MzcegBcoZY4u47MICP656i2dIVLjUL+r4ls0YtFEJmvklMmTLOc2b3r7P0U/7jfJxy 5v+KenIabhfhJFB38h+hY//9T8q0Nbs9DOGPXbqGVLFOCPUafZ9HWG5LPtQ+YL7njOa3w7n/cAP9K A4uPl1N9BsK88zTA3vloiDB4R2exTNIuCTkJHQypLbYr9QRC4xUYMui8wM3Xqfc7DwX1PVRKNw9t+ DGX3F7DRQJM7H+WrsfS/Kg==; Date: Thu, 14 Nov 2024 13:42:18 +0200 Message-Id: <86iksqjb39.fsf@gnu.org> From: Eli Zaretskii In-Reply-To: <4127F2A6-D61A-4B77-9172-16861383B73C@subvertising.org> (message from Divya Ranjan on Thu, 14 Nov 2024 11:09:41 +0000) References: <8734k0cs1u.fsf@subvertising.org> <86zfm2jjbo.fsf@gnu.org> <87frnu2mar.fsf@subvertising.org> <86ldxmjfim.fsf@gnu.org> <4127F2A6-D61A-4B77-9172-16861383B73C@subvertising.org> X-Spam-Score: -2.3 (--) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) > Date: Thu, 14 Nov 2024 11:09:41 +0000 > From: Divya Ranjan > CC: monnier@iro.umontreal.ca, 74281@debbugs.gnu.org > > > I don't understand the question: I thought I pointed at the possible cause by mentioning syntax-directed > font lock? > > I meant you said the emacs build is "unoptimized", what can be optimized? No, it means the C files were compiled with -O0, which disables compiler optimizations, so my Emacs is supposed to be slower than normal. And yet I seed no lags with C-n, unlike what you report. From unknown Sun Jun 22 11:42:48 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74281: 30.0.91; font-lock mode hangs on scrolling large Scheme file Resent-From: Stefan Monnier Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 14 Nov 2024 16:57:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74281 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Eli Zaretskii Cc: Divya Ranjan , 74281@debbugs.gnu.org Received: via spool by 74281-submit@debbugs.gnu.org id=B74281.17316034101902 (code B ref 74281); Thu, 14 Nov 2024 16:57:02 +0000 Received: (at 74281) by debbugs.gnu.org; 14 Nov 2024 16:56:50 +0000 Received: from localhost ([127.0.0.1]:46958 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tBd9F-0000Uc-Fe for submit@debbugs.gnu.org; Thu, 14 Nov 2024 11:56:49 -0500 Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:28047) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tBd9D-0000UP-Eq for 74281@debbugs.gnu.org; Thu, 14 Nov 2024 11:56:47 -0500 Received: from pmg3.iro.umontreal.ca (localhost [127.0.0.1]) by pmg3.iro.umontreal.ca (Proxmox) with ESMTP id CD622442683; Thu, 14 Nov 2024 11:56:40 -0500 (EST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1731603398; bh=CbRluiu7+NL/Q4JBkBzwru81PRrb98wKdD+hnloKwik=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=KBZUupxYomdOgZoNJKpIhz4DSh2QIaW3zHGm8ourFnRUyVGIPIwVTRrpPQ71xjP68 0gb4nvppLGnBvWBFu4oBIGkL1IFP1T0BSuEWOMNzxQBUGI2D4s9llCrPo6MZ601QL7 kPsi0izQWfFhzDynjKy5CF0aJyvufZlp48N8TVMD2Q8IZUbOCjf1Af+A2ecsXtlcwk JeTMKJJBawIAp9GxI3jaqxhfINJTQgiTka6eMt0xwlKQSGYwAy8LK6qVGliniGmPn6 aAL7wlKnf3KXQTuiA4If4j+h+X4Sd8k7p/fJH8Xm2yPQoA32mPxiwolytH4pJwk/RM WBhbPOqyHygdw== Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg3.iro.umontreal.ca (Proxmox) with ESMTP id 86A09442629; Thu, 14 Nov 2024 11:56:38 -0500 (EST) Received: from alfajor (modemcable005.21-80-70.mc.videotron.ca [70.80.21.5]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id 651291201CF; Thu, 14 Nov 2024 11:56:38 -0500 (EST) From: Stefan Monnier In-Reply-To: <86zfm2jjbo.fsf@gnu.org> (Eli Zaretskii's message of "Thu, 14 Nov 2024 10:44:27 +0200") Message-ID: References: <8734k0cs1u.fsf@subvertising.org> <86zfm2jjbo.fsf@gnu.org> Date: Thu, 14 Nov 2024 11:56:37 -0500 User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-SPAM-INFO: Spam detection results: 0 ALL_TRUSTED -1 Passed through trusted hosts only via SMTP AWL 0.077 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% DKIM_SIGNED 0.1 Message has a DKIM or DK signature, not necessarily valid DKIM_VALID -0.1 Message has at least one valid DKIM or DK signature DKIM_VALID_AU -0.1 Message has a valid DKIM or DK signature from author's domain DKIM_VALID_EF -0.1 Message has a valid DKIM or DK signature from envelope-from domain X-SPAM-LEVEL: X-Spam-Score: -2.3 (--) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) > Stefan, what tools do we have to investigate slowness related to > parse-partial-sexp? Or maybe you have suggestions for how to speed up > font-lock in this case? Hmm... `parse-partial-sexp` is normally expected to be fast, unless it has to scan a lot of text. > Here's the profile I get while moving with C-p through the above file: A stab in the dark, but maybe the relevant call is the one in: (state (if (or syntax-ppss-table (not font-lock--syntax-table-affects-ppss)) (syntax-ppss start) ;; If `syntax-ppss' doesn't have its own syntax-table and ;; we have installed our own syntax-table which ;; differs from the standard one in ways which affects PPSS, ;; then we can't use `syntax-ppss' since that would pollute ;; and be polluted by its cache. (parse-partial-sexp (point-min) start))) so the origin of the slowdown would be the (?#. "w 14") in the setting below in `scheme.el`: (setq font-lock-defaults '((scheme-font-lock-keywords scheme-font-lock-keywords-1 scheme-font-lock-keywords-2) nil t (("+-*/.<>=!?$%_&~^:" . "w") (?#. "w 14")) beginning-of-defun (font-lock-mark-block-function . mark-defun))) in which case, setting a `syntax-ppss-table` should fix the problem, tho we could also fix it by being more careful: AFAICT the purpose of this (?#. "w 14") is only to change the syntax of `#` from "prefix" to "word" without changing the comment-related flags, so it shouldn't cause `font-lock--syntax-table-affects-ppss` to be set. So, we could solve it by improving the code that sets `font-lock--syntax-table-affects-ppss`, as in the patch below. Stefan diff --git a/lisp/font-lock.el b/lisp/font-lock.el index 203131bfd5a..f6299920c0a 100644 --- a/lisp/font-lock.el +++ b/lisp/font-lock.el @@ -1955,14 +1955,15 @@ font-lock-set-defaults (dolist (char (if (numberp (car selem)) (list (car selem)) (mapcar #'identity (car selem)))) - (unless (memq (car (aref font-lock-syntax-table char)) - '(1 2 3)) ;"." "w" "_" - (setq font-lock--syntax-table-affects-ppss t)) - (modify-syntax-entry char syntax font-lock-syntax-table) - (unless (memq (car (aref font-lock-syntax-table char)) - '(1 2 3)) ;"." "w" "_" - (setq font-lock--syntax-table-affects-ppss t)) - )))) + (let ((old-syntax (aref font-lock-syntax-table char))) + (modify-syntax-entry char syntax font-lock-syntax-table) + (let ((new-syntax (aref font-lock-syntax-table char))) + (unless (and (equal (cdr old-syntax) (cdr new-syntax)) + (memq (logand (car old-syntax) 255) '(1 2 3 6)) + (memq (logand (car new-syntax) 255) '(1 2 3 6)) + (equal (ash (car old-syntax) -8) + (ash (car new-syntax) -8))) + (setq font-lock--syntax-table-affects-ppss t)))))))) ;; (nth 4 defaults) used to hold `font-lock-beginning-of-syntax-function', ;; but that was removed in 25.1, so if it's a cons cell, we assume that ;; it's part of the variable alist. From unknown Sun Jun 22 11:42:48 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74281: 30.0.91; font-lock mode hangs on scrolling large Scheme file Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 30 Nov 2024 09:52:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74281 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: divya@subvertising.org, Stefan Monnier Cc: 74281@debbugs.gnu.org Received: via spool by 74281-submit@debbugs.gnu.org id=B74281.173296032025426 (code B ref 74281); Sat, 30 Nov 2024 09:52:02 +0000 Received: (at 74281) by debbugs.gnu.org; 30 Nov 2024 09:52:00 +0000 Received: from localhost ([127.0.0.1]:45463 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tHK8t-0006c1-Km for submit@debbugs.gnu.org; Sat, 30 Nov 2024 04:52:00 -0500 Received: from eggs.gnu.org ([209.51.188.92]:60670) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tHK8s-0006bi-0A for 74281@debbugs.gnu.org; Sat, 30 Nov 2024 04:51:58 -0500 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tHK8m-00064P-OI; Sat, 30 Nov 2024 04:51:52 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=cb02+qPoHhtgiIwF+YYOEh3cyskynX5L7YjzhXvmlTs=; b=dg8uRr3Ps4h+ 8PLeMCfX08N7oJpJKZAybLfhaWLKCY0z85NYExwMZ4C8ciaaQIwdZshCz1QU8UjwNQlhLITZZbR40 TvDC9JPbxfwM4FBEftn+epvb9BRQfEzqY8ZBUZGlaKrziPLOP7saLzt3B/z3D7C52VNc+QS9JIy9h q0VF80Uqsk9/53QUG19MrVk+NxtRSP/VLMp0mOpAG8qtU68bw7zKwDE9lIsJ5YUoKlxZGojR1iaDc lT76y7lgvXrtPlOUfQb0TiBgzG9X9UhouBLi3D9ihLgRRL8uByeItePBIGFkWJrNtOUCpjecq8dq0 kOo1UBH30fB7+curdiuZ5Q==; Date: Sat, 30 Nov 2024 11:51:49 +0200 Message-Id: <865xo59hhm.fsf@gnu.org> From: Eli Zaretskii In-Reply-To: (message from Stefan Monnier on Thu, 14 Nov 2024 11:56:37 -0500) References: <8734k0cs1u.fsf@subvertising.org> <86zfm2jjbo.fsf@gnu.org> X-Spam-Score: -2.3 (--) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) Ping! Divya, could you please try Stefan's suggestions and report back? > Cc: Divya Ranjan , 74281@debbugs.gnu.org > From: Stefan Monnier > Date: Thu, 14 Nov 2024 11:56:37 -0500 > > > Stefan, what tools do we have to investigate slowness related to > > parse-partial-sexp? Or maybe you have suggestions for how to speed up > > font-lock in this case? > > Hmm... `parse-partial-sexp` is normally expected to be fast, unless it > has to scan a lot of text. > > > Here's the profile I get while moving with C-p through the above file: > > A stab in the dark, but maybe the relevant call is the one in: > > (state (if (or syntax-ppss-table > (not font-lock--syntax-table-affects-ppss)) > (syntax-ppss start) > ;; If `syntax-ppss' doesn't have its own syntax-table and > ;; we have installed our own syntax-table which > ;; differs from the standard one in ways which affects PPSS, > ;; then we can't use `syntax-ppss' since that would pollute > ;; and be polluted by its cache. > (parse-partial-sexp (point-min) start))) > > so the origin of the slowdown would be the (?#. "w 14") in the setting > below in `scheme.el`: > > (setq font-lock-defaults > '((scheme-font-lock-keywords > scheme-font-lock-keywords-1 scheme-font-lock-keywords-2) > nil t (("+-*/.<>=!?$%_&~^:" . "w") (?#. "w 14")) > beginning-of-defun > (font-lock-mark-block-function . mark-defun))) > > in which case, setting a `syntax-ppss-table` should fix the problem, tho > we could also fix it by being more careful: AFAICT the purpose of this > (?#. "w 14") is only to change the syntax of `#` from "prefix" to "word" > without changing the comment-related flags, so it shouldn't cause > `font-lock--syntax-table-affects-ppss` to be set. > So, we could solve it by improving the code that sets > `font-lock--syntax-table-affects-ppss`, as in the patch below. > > > Stefan > > > diff --git a/lisp/font-lock.el b/lisp/font-lock.el > index 203131bfd5a..f6299920c0a 100644 > --- a/lisp/font-lock.el > +++ b/lisp/font-lock.el > @@ -1955,14 +1955,15 @@ font-lock-set-defaults > (dolist (char (if (numberp (car selem)) > (list (car selem)) > (mapcar #'identity (car selem)))) > - (unless (memq (car (aref font-lock-syntax-table char)) > - '(1 2 3)) ;"." "w" "_" > - (setq font-lock--syntax-table-affects-ppss t)) > - (modify-syntax-entry char syntax font-lock-syntax-table) > - (unless (memq (car (aref font-lock-syntax-table char)) > - '(1 2 3)) ;"." "w" "_" > - (setq font-lock--syntax-table-affects-ppss t)) > - )))) > + (let ((old-syntax (aref font-lock-syntax-table char))) > + (modify-syntax-entry char syntax font-lock-syntax-table) > + (let ((new-syntax (aref font-lock-syntax-table char))) > + (unless (and (equal (cdr old-syntax) (cdr new-syntax)) > + (memq (logand (car old-syntax) 255) '(1 2 3 6)) > + (memq (logand (car new-syntax) 255) '(1 2 3 6)) > + (equal (ash (car old-syntax) -8) > + (ash (car new-syntax) -8))) > + (setq font-lock--syntax-table-affects-ppss t)))))))) > ;; (nth 4 defaults) used to hold `font-lock-beginning-of-syntax-function', > ;; but that was removed in 25.1, so if it's a cons cell, we assume that > ;; it's part of the variable alist. > > > > > From unknown Sun Jun 22 11:42:48 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74281: 30.0.91; font-lock mode hangs on scrolling large Scheme file Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 14 Dec 2024 09:35:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74281 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: divya@subvertising.org Cc: monnier@iro.umontreal.ca, 74281@debbugs.gnu.org Received: via spool by 74281-submit@debbugs.gnu.org id=B74281.173416889225271 (code B ref 74281); Sat, 14 Dec 2024 09:35:02 +0000 Received: (at 74281) by debbugs.gnu.org; 14 Dec 2024 09:34:52 +0000 Received: from localhost ([127.0.0.1]:45450 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tMOXz-0006ZX-Sj for submit@debbugs.gnu.org; Sat, 14 Dec 2024 04:34:52 -0500 Received: from eggs.gnu.org ([209.51.188.92]:53914) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tMOXx-0006ZG-3P for 74281@debbugs.gnu.org; Sat, 14 Dec 2024 04:34:50 -0500 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tMOXr-00008W-1m; Sat, 14 Dec 2024 04:34:43 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=RmvWJ4GBssuQKEBDRkFqyWmvpTJBCpe91yIThRKm6zc=; b=ds4H/QplQp8t /N+7s1Yn8AvwVnB9HEpCEu+mNFFTh1i23nNpPxlPkrk1tCeGx3p0zPNaiqzqbjJZr+Hg1P/aB1K2t SmrceZQwe5BZMqHMo1EWXap1lpBVVdyxCv5kifXEBTjY4GqF6xIosShvKUQd2Y8QyEB+VQQ1CuOJ0 IJMyGDk/iLnTM76VM0nPg19C25wLMIoWlIvcjRhapXNGumssKB1o1oZ+pKWQXZ52ZI/7/nVqTpzeu oR4SvC9GrqY+pcecfI9mSCzzxRrp1lhAmkVL4V5DTYUBw81Z+Ty3jgbcTA5lRgwY6V4JiFfQY/HVH wFQoM0SBi/3vde7PHaYs3A==; Date: Sat, 14 Dec 2024 11:34:40 +0200 Message-Id: <8634iqwqtr.fsf@gnu.org> From: Eli Zaretskii In-Reply-To: <865xo59hhm.fsf@gnu.org> (message from Eli Zaretskii on Sat, 30 Nov 2024 11:51:49 +0200) References: <8734k0cs1u.fsf@subvertising.org> <86zfm2jjbo.fsf@gnu.org> <865xo59hhm.fsf@gnu.org> X-Spam-Score: -2.3 (--) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) Ping! Ping! Divya, are you there? > Cc: 74281@debbugs.gnu.org > Date: Sat, 30 Nov 2024 11:51:49 +0200 > From: Eli Zaretskii > > Ping! Divya, could you please try Stefan's suggestions and report > back? > > > Cc: Divya Ranjan , 74281@debbugs.gnu.org > > From: Stefan Monnier > > Date: Thu, 14 Nov 2024 11:56:37 -0500 > > > > > Stefan, what tools do we have to investigate slowness related to > > > parse-partial-sexp? Or maybe you have suggestions for how to speed up > > > font-lock in this case? > > > > Hmm... `parse-partial-sexp` is normally expected to be fast, unless it > > has to scan a lot of text. > > > > > Here's the profile I get while moving with C-p through the above file: > > > > A stab in the dark, but maybe the relevant call is the one in: > > > > (state (if (or syntax-ppss-table > > (not font-lock--syntax-table-affects-ppss)) > > (syntax-ppss start) > > ;; If `syntax-ppss' doesn't have its own syntax-table and > > ;; we have installed our own syntax-table which > > ;; differs from the standard one in ways which affects PPSS, > > ;; then we can't use `syntax-ppss' since that would pollute > > ;; and be polluted by its cache. > > (parse-partial-sexp (point-min) start))) > > > > so the origin of the slowdown would be the (?#. "w 14") in the setting > > below in `scheme.el`: > > > > (setq font-lock-defaults > > '((scheme-font-lock-keywords > > scheme-font-lock-keywords-1 scheme-font-lock-keywords-2) > > nil t (("+-*/.<>=!?$%_&~^:" . "w") (?#. "w 14")) > > beginning-of-defun > > (font-lock-mark-block-function . mark-defun))) > > > > in which case, setting a `syntax-ppss-table` should fix the problem, tho > > we could also fix it by being more careful: AFAICT the purpose of this > > (?#. "w 14") is only to change the syntax of `#` from "prefix" to "word" > > without changing the comment-related flags, so it shouldn't cause > > `font-lock--syntax-table-affects-ppss` to be set. > > So, we could solve it by improving the code that sets > > `font-lock--syntax-table-affects-ppss`, as in the patch below. > > > > > > Stefan > > > > > > diff --git a/lisp/font-lock.el b/lisp/font-lock.el > > index 203131bfd5a..f6299920c0a 100644 > > --- a/lisp/font-lock.el > > +++ b/lisp/font-lock.el > > @@ -1955,14 +1955,15 @@ font-lock-set-defaults > > (dolist (char (if (numberp (car selem)) > > (list (car selem)) > > (mapcar #'identity (car selem)))) > > - (unless (memq (car (aref font-lock-syntax-table char)) > > - '(1 2 3)) ;"." "w" "_" > > - (setq font-lock--syntax-table-affects-ppss t)) > > - (modify-syntax-entry char syntax font-lock-syntax-table) > > - (unless (memq (car (aref font-lock-syntax-table char)) > > - '(1 2 3)) ;"." "w" "_" > > - (setq font-lock--syntax-table-affects-ppss t)) > > - )))) > > + (let ((old-syntax (aref font-lock-syntax-table char))) > > + (modify-syntax-entry char syntax font-lock-syntax-table) > > + (let ((new-syntax (aref font-lock-syntax-table char))) > > + (unless (and (equal (cdr old-syntax) (cdr new-syntax)) > > + (memq (logand (car old-syntax) 255) '(1 2 3 6)) > > + (memq (logand (car new-syntax) 255) '(1 2 3 6)) > > + (equal (ash (car old-syntax) -8) > > + (ash (car new-syntax) -8))) > > + (setq font-lock--syntax-table-affects-ppss t)))))))) > > ;; (nth 4 defaults) used to hold `font-lock-beginning-of-syntax-function', > > ;; but that was removed in 25.1, so if it's a cons cell, we assume that > > ;; it's part of the variable alist. > > > > > > > > > > > > > > From unknown Sun Jun 22 11:42:48 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74281: 30.0.91; font-lock mode hangs on scrolling large Scheme file Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 28 Dec 2024 11:10:03 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74281 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: divya@subvertising.org Cc: monnier@iro.umontreal.ca, 74281@debbugs.gnu.org Received: via spool by 74281-submit@debbugs.gnu.org id=B74281.173538419724744 (code B ref 74281); Sat, 28 Dec 2024 11:10:03 +0000 Received: (at 74281) by debbugs.gnu.org; 28 Dec 2024 11:09:57 +0000 Received: from localhost ([127.0.0.1]:48956 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tRUhh-0006R1-5H for submit@debbugs.gnu.org; Sat, 28 Dec 2024 06:09:57 -0500 Received: from eggs.gnu.org ([209.51.188.92]:40722) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tRUhf-0006Qo-98 for 74281@debbugs.gnu.org; Sat, 28 Dec 2024 06:09:55 -0500 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tRUha-0006GU-2f; Sat, 28 Dec 2024 06:09:50 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=pbzpIoK0vkfHVzf5XmgiHs25TFpmYtXLAiFj0wrI8Lo=; b=i6MlimP/g0Ut rZGFJtl/XlO4/BQv0kJ/He5iioiMIlL3vWbHKQs2CtfMftxcOoN10NQezl4D2mqh3JziSSLMQoK14 H97YIbWd7NMc03q/SAHh+I1NAVYHlt8kQKu/tf0uSByEeLjfsZ7X0XEqk/1VzMXN5oVTzri09+YL1 OC1wgb5Izt55LCZjp2e3AjuQFK5nnbPy22XG7jRBiPuWeJ2/1g4EKNpQCoTKTZk+XymJiQCmRuQ/2 XcAg8Qi/EZLPbGbhh/vv9LGfq80tk9El/nCMAbJlvacli+I/1Zc5HVBw9TgLqTtNQJIhhkuIJJQme 7OLxJ2onRKkzz0Bvmk7TwA==; Date: Sat, 28 Dec 2024 13:09:46 +0200 Message-Id: <86msggt66d.fsf@gnu.org> From: Eli Zaretskii In-Reply-To: <8634iqwqtr.fsf@gnu.org> (message from Eli Zaretskii on Sat, 14 Dec 2024 11:34:40 +0200) References: <8734k0cs1u.fsf@subvertising.org> <86zfm2jjbo.fsf@gnu.org> <865xo59hhm.fsf@gnu.org> <8634iqwqtr.fsf@gnu.org> X-Spam-Score: -2.3 (--) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) Ping! Ping! Ping! Divya, please respond. > Cc: monnier@iro.umontreal.ca, 74281@debbugs.gnu.org > Date: Sat, 14 Dec 2024 11:34:40 +0200 > From: Eli Zaretskii > > Ping! Ping! Divya, are you there? > > > Cc: 74281@debbugs.gnu.org > > Date: Sat, 30 Nov 2024 11:51:49 +0200 > > From: Eli Zaretskii > > > > Ping! Divya, could you please try Stefan's suggestions and report > > back? > > > > > Cc: Divya Ranjan , 74281@debbugs.gnu.org > > > From: Stefan Monnier > > > Date: Thu, 14 Nov 2024 11:56:37 -0500 > > > > > > > Stefan, what tools do we have to investigate slowness related to > > > > parse-partial-sexp? Or maybe you have suggestions for how to speed up > > > > font-lock in this case? > > > > > > Hmm... `parse-partial-sexp` is normally expected to be fast, unless it > > > has to scan a lot of text. > > > > > > > Here's the profile I get while moving with C-p through the above file: > > > > > > A stab in the dark, but maybe the relevant call is the one in: > > > > > > (state (if (or syntax-ppss-table > > > (not font-lock--syntax-table-affects-ppss)) > > > (syntax-ppss start) > > > ;; If `syntax-ppss' doesn't have its own syntax-table and > > > ;; we have installed our own syntax-table which > > > ;; differs from the standard one in ways which affects PPSS, > > > ;; then we can't use `syntax-ppss' since that would pollute > > > ;; and be polluted by its cache. > > > (parse-partial-sexp (point-min) start))) > > > > > > so the origin of the slowdown would be the (?#. "w 14") in the setting > > > below in `scheme.el`: > > > > > > (setq font-lock-defaults > > > '((scheme-font-lock-keywords > > > scheme-font-lock-keywords-1 scheme-font-lock-keywords-2) > > > nil t (("+-*/.<>=!?$%_&~^:" . "w") (?#. "w 14")) > > > beginning-of-defun > > > (font-lock-mark-block-function . mark-defun))) > > > > > > in which case, setting a `syntax-ppss-table` should fix the problem, tho > > > we could also fix it by being more careful: AFAICT the purpose of this > > > (?#. "w 14") is only to change the syntax of `#` from "prefix" to "word" > > > without changing the comment-related flags, so it shouldn't cause > > > `font-lock--syntax-table-affects-ppss` to be set. > > > So, we could solve it by improving the code that sets > > > `font-lock--syntax-table-affects-ppss`, as in the patch below. > > > > > > > > > Stefan > > > > > > > > > diff --git a/lisp/font-lock.el b/lisp/font-lock.el > > > index 203131bfd5a..f6299920c0a 100644 > > > --- a/lisp/font-lock.el > > > +++ b/lisp/font-lock.el > > > @@ -1955,14 +1955,15 @@ font-lock-set-defaults > > > (dolist (char (if (numberp (car selem)) > > > (list (car selem)) > > > (mapcar #'identity (car selem)))) > > > - (unless (memq (car (aref font-lock-syntax-table char)) > > > - '(1 2 3)) ;"." "w" "_" > > > - (setq font-lock--syntax-table-affects-ppss t)) > > > - (modify-syntax-entry char syntax font-lock-syntax-table) > > > - (unless (memq (car (aref font-lock-syntax-table char)) > > > - '(1 2 3)) ;"." "w" "_" > > > - (setq font-lock--syntax-table-affects-ppss t)) > > > - )))) > > > + (let ((old-syntax (aref font-lock-syntax-table char))) > > > + (modify-syntax-entry char syntax font-lock-syntax-table) > > > + (let ((new-syntax (aref font-lock-syntax-table char))) > > > + (unless (and (equal (cdr old-syntax) (cdr new-syntax)) > > > + (memq (logand (car old-syntax) 255) '(1 2 3 6)) > > > + (memq (logand (car new-syntax) 255) '(1 2 3 6)) > > > + (equal (ash (car old-syntax) -8) > > > + (ash (car new-syntax) -8))) > > > + (setq font-lock--syntax-table-affects-ppss t)))))))) > > > ;; (nth 4 defaults) used to hold `font-lock-beginning-of-syntax-function', > > > ;; but that was removed in 25.1, so if it's a cons cell, we assume that > > > ;; it's part of the variable alist. > > > > > > > > > > > > > > > > > > > > > > > > > > > From unknown Sun Jun 22 11:42:48 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74281: 30.0.91; font-lock mode hangs on scrolling large Scheme file Resent-From: Stefan Monnier Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 28 Dec 2024 15:04:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74281 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Eli Zaretskii Cc: divya@subvertising.org, 74281@debbugs.gnu.org Received: via spool by 74281-submit@debbugs.gnu.org id=B74281.17353982196154 (code B ref 74281); Sat, 28 Dec 2024 15:04:01 +0000 Received: (at 74281) by debbugs.gnu.org; 28 Dec 2024 15:03:39 +0000 Received: from localhost ([127.0.0.1]:52279 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tRYLr-0001bB-5C for submit@debbugs.gnu.org; Sat, 28 Dec 2024 10:03:39 -0500 Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:59936) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tRYLo-0001ax-Ro for 74281@debbugs.gnu.org; Sat, 28 Dec 2024 10:03:37 -0500 Received: from pmg2.iro.umontreal.ca (localhost.localdomain [127.0.0.1]) by pmg2.iro.umontreal.ca (Proxmox) with ESMTP id 6FEBA8089D; Sat, 28 Dec 2024 10:03:31 -0500 (EST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1735398210; bh=/ObhJ4SThutXZY+OAK7fPxEhtOQGfT3zwOi38le7mQU=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=YRHUrQOofmlEmMxxjppOzuLk/P27A5l9RfpQXZhay2DOj/tPni5ny+avUv6WV/x+o 7jWWPZnTeX1L2rdPumxsAuDoClou3NGdM7hjb76HID2mUDENHQk27dYI0Bk1bZAKBX tlivJkk6yQLlS+/GAlFyrFtXPtThg0QTimBCuiluDbtSzW3S2uAnGYK0hGn40V3qH0 n+a2d1hUVqkXyYldk/RlUpoohlAZfXMifJGwtyEAJ3sbNwlAD4G8J7YD9v/KspuWNf qbFLFtuTb+USGkoUQsM0s42Nyk6tyqkW6SxoMhLNpuiY0uGhmLea0cxusNkssGmtYa G7Y6vQJbgjTEQ== Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg2.iro.umontreal.ca (Proxmox) with ESMTP id 5D0848029E; Sat, 28 Dec 2024 10:03:30 -0500 (EST) Received: from pastel (104-195-225-43.cpe.teksavvy.com [104.195.225.43]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id 2AD39120478; Sat, 28 Dec 2024 10:03:30 -0500 (EST) From: Stefan Monnier In-Reply-To: <865xo59hhm.fsf@gnu.org> (Eli Zaretskii's message of "Sat, 30 Nov 2024 11:51:49 +0200") Message-ID: References: <8734k0cs1u.fsf@subvertising.org> <86zfm2jjbo.fsf@gnu.org> <865xo59hhm.fsf@gnu.org> Date: Sat, 28 Dec 2024 10:03:29 -0500 User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-SPAM-INFO: Spam detection results: 0 ALL_TRUSTED -1 Passed through trusted hosts only via SMTP AWL -0.052 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% DKIM_SIGNED 0.1 Message has a DKIM or DK signature, not necessarily valid DKIM_VALID -0.1 Message has at least one valid DKIM or DK signature DKIM_VALID_AU -0.1 Message has a valid DKIM or DK signature from author's domain DKIM_VALID_EF -0.1 Message has a valid DKIM or DK signature from envelope-from domain X-SPAM-LEVEL: X-Spam-Score: -2.3 (--) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) > Ping! Divya, could you please try Stefan's suggestions and report > back? FWIW, I think the change is an improvement in any case, so we could install it. Since it's in a "core" file, it might be too risky for `emacs-30`, so I'm thinking of installing it in `master`, WDYT? Stefan >> Cc: Divya Ranjan , 74281@debbugs.gnu.org >> From: Stefan Monnier >> Date: Thu, 14 Nov 2024 11:56:37 -0500 >> >> > Stefan, what tools do we have to investigate slowness related to >> > parse-partial-sexp? Or maybe you have suggestions for how to speed up >> > font-lock in this case? >> >> Hmm... `parse-partial-sexp` is normally expected to be fast, unless it >> has to scan a lot of text. >> >> > Here's the profile I get while moving with C-p through the above file: >> >> A stab in the dark, but maybe the relevant call is the one in: >> >> (state (if (or syntax-ppss-table >> (not font-lock--syntax-table-affects-ppss)) >> (syntax-ppss start) >> ;; If `syntax-ppss' doesn't have its own syntax-table and >> ;; we have installed our own syntax-table which >> ;; differs from the standard one in ways which affects PPSS, >> ;; then we can't use `syntax-ppss' since that would pollute >> ;; and be polluted by its cache. >> (parse-partial-sexp (point-min) start))) >> >> so the origin of the slowdown would be the (?#. "w 14") in the setting >> below in `scheme.el`: >> >> (setq font-lock-defaults >> '((scheme-font-lock-keywords >> scheme-font-lock-keywords-1 scheme-font-lock-keywords-2) >> nil t (("+-*/.<>=!?$%_&~^:" . "w") (?#. "w 14")) >> beginning-of-defun >> (font-lock-mark-block-function . mark-defun))) >> >> in which case, setting a `syntax-ppss-table` should fix the problem, tho >> we could also fix it by being more careful: AFAICT the purpose of this >> (?#. "w 14") is only to change the syntax of `#` from "prefix" to "word" >> without changing the comment-related flags, so it shouldn't cause >> `font-lock--syntax-table-affects-ppss` to be set. >> So, we could solve it by improving the code that sets >> `font-lock--syntax-table-affects-ppss`, as in the patch below. >> >> >> Stefan >> >> >> diff --git a/lisp/font-lock.el b/lisp/font-lock.el >> index 203131bfd5a..f6299920c0a 100644 >> --- a/lisp/font-lock.el >> +++ b/lisp/font-lock.el >> @@ -1955,14 +1955,15 @@ font-lock-set-defaults >> (dolist (char (if (numberp (car selem)) >> (list (car selem)) >> (mapcar #'identity (car selem)))) >> - (unless (memq (car (aref font-lock-syntax-table char)) >> - '(1 2 3)) ;"." "w" "_" >> - (setq font-lock--syntax-table-affects-ppss t)) >> - (modify-syntax-entry char syntax font-lock-syntax-table) >> - (unless (memq (car (aref font-lock-syntax-table char)) >> - '(1 2 3)) ;"." "w" "_" >> - (setq font-lock--syntax-table-affects-ppss t)) >> - )))) >> + (let ((old-syntax (aref font-lock-syntax-table char))) >> + (modify-syntax-entry char syntax font-lock-syntax-table) >> + (let ((new-syntax (aref font-lock-syntax-table char))) >> + (unless (and (equal (cdr old-syntax) (cdr new-syntax)) >> + (memq (logand (car old-syntax) 255) '(1 2 3 6)) >> + (memq (logand (car new-syntax) 255) '(1 2 3 6)) >> + (equal (ash (car old-syntax) -8) >> + (ash (car new-syntax) -8))) >> + (setq font-lock--syntax-table-affects-ppss t)))))))) >> ;; (nth 4 defaults) used to hold `font-lock-beginning-of-syntax-function', >> ;; but that was removed in 25.1, so if it's a cons cell, we assume that >> ;; it's part of the variable alist. >> >> >> >> >> From unknown Sun Jun 22 11:42:48 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74281: 30.0.91; font-lock mode hangs on scrolling large Scheme file Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 28 Dec 2024 16:37:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74281 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Stefan Monnier Cc: divya@subvertising.org, 74281@debbugs.gnu.org Received: via spool by 74281-submit@debbugs.gnu.org id=B74281.173540376822659 (code B ref 74281); Sat, 28 Dec 2024 16:37:02 +0000 Received: (at 74281) by debbugs.gnu.org; 28 Dec 2024 16:36:08 +0000 Received: from localhost ([127.0.0.1]:52439 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tRZnM-0005tP-8s for submit@debbugs.gnu.org; Sat, 28 Dec 2024 11:36:08 -0500 Received: from eggs.gnu.org ([209.51.188.92]:33450) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tRZnK-0005sv-Tj for 74281@debbugs.gnu.org; Sat, 28 Dec 2024 11:36:07 -0500 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tRZl9-00010A-St; Sat, 28 Dec 2024 11:33:51 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=vowqBJMwyMUQDhfw7qADLQCWKq3QT5BcJYzKXtTOJDU=; b=Xw+MOTxS8xP+ +glqrWT/CDSEeh6MbjX8ayMCqatrPZJEF7FmRe56xiigHXcBMYkXqSWI0iKyxcdNbjgSn7KUI8Shm Tp/bQRBlkIXPBXA104hOBViIUO5HvoW+5eEoe5xNYS9QvUH2iepfe0O8ZnUp9dEMWmdA17QJp9Gxc n9cKwDwZBD1hHfhNBiHPvi/SBUYUsjVGtOC3lMfVZF1TYLqfVvu/LjC2oaMT016180qSxwz3jjjX/ ww9+0vI1qRv1O7BT4g688dZzz8LoNwBAgQVBFDrGu1liWgVuwpAU4HRmw7SduvQuXWH0OWNBAC5cj KLWPd3wg/I8f7/FMpVPcRA==; Date: Sat, 28 Dec 2024 18:33:49 +0200 Message-Id: <86a5cfsr6a.fsf@gnu.org> From: Eli Zaretskii In-Reply-To: (message from Stefan Monnier on Sat, 28 Dec 2024 10:03:29 -0500) References: <8734k0cs1u.fsf@subvertising.org> <86zfm2jjbo.fsf@gnu.org> <865xo59hhm.fsf@gnu.org> X-Spam-Score: -2.3 (--) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) > From: Stefan Monnier > Cc: divya@subvertising.org, 74281@debbugs.gnu.org > Date: Sat, 28 Dec 2024 10:03:29 -0500 > > > Ping! Divya, could you please try Stefan's suggestions and report > > back? > > FWIW, I think the change is an improvement in any case, so we could > install it. Since it's in a "core" file, it might be too risky for > `emacs-30`, so I'm thinking of installing it in `master`, WDYT? Fine by me, thanks. From unknown Sun Jun 22 11:42:48 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74281: 30.0.91; font-lock mode hangs on scrolling large Scheme file Resent-From: Stefan Monnier Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 29 Dec 2024 15:21:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74281 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Eli Zaretskii Cc: divya@subvertising.org, 74281@debbugs.gnu.org Received: via spool by 74281-submit@debbugs.gnu.org id=B74281.173548563721482 (code B ref 74281); Sun, 29 Dec 2024 15:21:02 +0000 Received: (at 74281) by debbugs.gnu.org; 29 Dec 2024 15:20:37 +0000 Received: from localhost ([127.0.0.1]:55872 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tRv5o-0005aQ-LK for submit@debbugs.gnu.org; Sun, 29 Dec 2024 10:20:36 -0500 Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:41574) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tRv5n-0005aE-Ra for 74281@debbugs.gnu.org; Sun, 29 Dec 2024 10:20:36 -0500 Received: from pmg3.iro.umontreal.ca (localhost [127.0.0.1]) by pmg3.iro.umontreal.ca (Proxmox) with ESMTP id 39C004415C8; Sun, 29 Dec 2024 10:20:29 -0500 (EST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1735485628; bh=bO0wBRp0NZB2McO+JHxdIum12wbnb22dQVeEq8sOEvs=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=iBrb3+At0GYKcOFEdFuCK5Vi9ixxMbpvyqAVE7oexzKxhozc6aiDYUDxx+I3zrscK 9BskMlAsfAsfwY6DN7Laso25t1b4aFP6trfD94Ov6/RbjkMAQEl/jlGciHKj5YbLjz QnaixNXhJJARrvn4mN1yv8x/QKTcoTtpahAPHY51jjailYW5WnGFLth419PHZ6Io76 RtzN10B/bDSsdVbP3rBqNrP9rZbrX0yz3x6bFUGgrDxy+w/FUCWirDY3gG4AtKQB4T NKNgIoyMyPlkTpKSyKXjgPdaYOk4gxne8/sCD1T/wUJE8In+bavwBx0EcJF/F/mJ+A 3/HKZI7Xc42Dg== Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg3.iro.umontreal.ca (Proxmox) with ESMTP id 45BB14414DA; Sun, 29 Dec 2024 10:20:28 -0500 (EST) Received: from pastel (104-195-225-43.cpe.teksavvy.com [104.195.225.43]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id 19E841204BF; Sun, 29 Dec 2024 10:20:28 -0500 (EST) From: Stefan Monnier In-Reply-To: <86a5cfsr6a.fsf@gnu.org> (Eli Zaretskii's message of "Sat, 28 Dec 2024 18:33:49 +0200") Message-ID: References: <8734k0cs1u.fsf@subvertising.org> <86zfm2jjbo.fsf@gnu.org> <865xo59hhm.fsf@gnu.org> <86a5cfsr6a.fsf@gnu.org> Date: Sun, 29 Dec 2024 10:20:19 -0500 User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-SPAM-INFO: Spam detection results: 0 ALL_TRUSTED -1 Passed through trusted hosts only via SMTP AWL -0.007 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% DKIM_SIGNED 0.1 Message has a DKIM or DK signature, not necessarily valid DKIM_VALID -0.1 Message has at least one valid DKIM or DK signature DKIM_VALID_AU -0.1 Message has a valid DKIM or DK signature from author's domain DKIM_VALID_EF -0.1 Message has a valid DKIM or DK signature from envelope-from domain X-SPAM-LEVEL: X-Spam-Score: -2.3 (--) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) >> > Ping! Divya, could you please try Stefan's suggestions and report >> > back? >> FWIW, I think the change is an improvement in any case, so we could >> install it. Since it's in a "core" file, it might be too risky for >> `emacs-30`, so I'm thinking of installing it in `master`, WDYT? > Fine by me, thanks. Pushed to `master`, thanks. Stefan From unknown Sun Jun 22 11:42:48 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74281: 30.0.91; font-lock mode hangs on scrolling large Scheme file Resent-From: Stefan Monnier Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 29 Dec 2024 18:02:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74281 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Eli Zaretskii Cc: divya@subvertising.org, 74281@debbugs.gnu.org Received: via spool by 74281-submit@debbugs.gnu.org id=B74281.173549528518673 (code B ref 74281); Sun, 29 Dec 2024 18:02:01 +0000 Received: (at 74281) by debbugs.gnu.org; 29 Dec 2024 18:01:25 +0000 Received: from localhost ([127.0.0.1]:56082 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tRxbQ-0004r6-Lf for submit@debbugs.gnu.org; Sun, 29 Dec 2024 13:01:24 -0500 Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:32500) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tRxbP-0004qu-5B for 74281@debbugs.gnu.org; Sun, 29 Dec 2024 13:01:23 -0500 Received: from pmg3.iro.umontreal.ca (localhost [127.0.0.1]) by pmg3.iro.umontreal.ca (Proxmox) with ESMTP id 9D5DE441701; Sun, 29 Dec 2024 13:01:15 -0500 (EST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1735495274; bh=IO/VpoL1Kpk8eZYIr/a1F2+tbdG6yll/Sgtyaa0q7Ys=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=bPd5v8Nb3AEi5gd4Zm9sJu7a6B9DwlxLJ1LOdDz1AwJj3794NVY4Gk8X4Tu1JgHmc YWTfFWjUg06ph3pvLas/LsKp52nNgdLXPAyWddGwu3GbjnTcR2j7oOm6dGi6syYAWO Jdvdh/uVisnnfsoR4B/h0gA8UcEh2+P62NUqbB1C99XJmnCFNx+VMpcTl3O2XNiQXI Wz+i9O3VbWUmd13/C0CuR9kq8PaFtNlMfMkr4CxCNQ/sX4vbIwUgJH+BHrH8bFrj4G cVVjoONOay+pGWhENjCCWo8Ycq6azFiSkJZUvSqTBFGgtsQAdkvZmkcv0N8D3a68FV +kFb92HXA3HbQ== Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg3.iro.umontreal.ca (Proxmox) with ESMTP id 9682A44166F; Sun, 29 Dec 2024 13:01:14 -0500 (EST) Received: from pastel (104-195-225-43.cpe.teksavvy.com [104.195.225.43]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id 674CB12022E; Sun, 29 Dec 2024 13:01:14 -0500 (EST) From: Stefan Monnier In-Reply-To: (Stefan Monnier's message of "Sun, 29 Dec 2024 10:20:19 -0500") Message-ID: References: <8734k0cs1u.fsf@subvertising.org> <86zfm2jjbo.fsf@gnu.org> <865xo59hhm.fsf@gnu.org> <86a5cfsr6a.fsf@gnu.org> Date: Sun, 29 Dec 2024 13:01:14 -0500 User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-SPAM-INFO: Spam detection results: 0 ALL_TRUSTED -1 Passed through trusted hosts only via SMTP AWL -0.007 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% DKIM_SIGNED 0.1 Message has a DKIM or DK signature, not necessarily valid DKIM_VALID -0.1 Message has at least one valid DKIM or DK signature DKIM_VALID_AU -0.1 Message has a valid DKIM or DK signature from author's domain DKIM_VALID_EF -0.1 Message has a valid DKIM or DK signature from envelope-from domain X-SPAM-LEVEL: X-Spam-Score: -2.3 (--) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) >>> > Ping! Divya, could you please try Stefan's suggestions and report >>> > back? >>> FWIW, I think the change is an improvement in any case, so we could >>> install it. Since it's in a "core" file, it might be too risky for >>> `emacs-30`, so I'm thinking of installing it in `master`, WDYT? >> Fine by me, thanks. > Pushed to `master`, thanks. BTW, if we want something on `emacs-30`, we could go with a patch like the one below. Stefan diff --git a/lisp/progmodes/scheme.el b/lisp/progmodes/scheme.el index a0f922f279c..c46422b7218 100644 --- a/lisp/progmodes/scheme.el +++ b/lisp/progmodes/scheme.el @@ -201,7 +201,10 @@ scheme-mode-variables scheme-font-lock-keywords-1 scheme-font-lock-keywords-2) nil t (("+-*/.<>=!?$%_&~^:" . "w") (?#. "w 14")) beginning-of-defun - (font-lock-mark-block-function . mark-defun))) + (font-lock-mark-block-function . mark-defun) + ;; The (?#. "w 14") above causes font-lock to incorrectly + ;; set `font-lock--syntax-table-affects-ppss' to t. + (font-lock--syntax-table-affects-ppss . nil))) (setq-local prettify-symbols-alist lisp-prettify-symbols-alist) (setq-local lisp-doc-string-elt-property 'scheme-doc-string-elt)) From unknown Sun Jun 22 11:42:48 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74281: 30.0.91; font-lock mode hangs on scrolling large Scheme file Resent-From: Divya Ranjan Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 29 Dec 2024 18:39:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74281 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: 74281@debbugs.gnu.org, eliz@gnu.org Cc: monnier@iro.umontreal.ca X-Debbugs-Original-To: bug-gnu-emacs@gnu.org, Eli Zaretskii X-Debbugs-Original-Cc: monnier@iro.umontreal.ca, 74281@debbugs.gnu.org Received: via spool by submit@debbugs.gnu.org id=B.173549752725880 (code B ref -1); Sun, 29 Dec 2024 18:39:02 +0000 Received: (at submit) by debbugs.gnu.org; 29 Dec 2024 18:38:47 +0000 Received: from localhost ([127.0.0.1]:56147 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tRyBa-0006jL-8Z for submit@debbugs.gnu.org; Sun, 29 Dec 2024 13:38:46 -0500 Received: from lists.gnu.org ([209.51.188.17]:33468) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tRyBX-0006jD-Iy for submit@debbugs.gnu.org; Sun, 29 Dec 2024 13:38:44 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tRyBW-0006xq-O1 for bug-gnu-emacs@gnu.org; Sun, 29 Dec 2024 13:38:43 -0500 Received: from latitanza.investici.org ([82.94.249.234]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tRyBU-0005Qw-H0; Sun, 29 Dec 2024 13:38:42 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=subvertising.org; s=stigmate; t=1735497507; bh=3Rny6seXddC3cq/glHRybR3CdT1x21eJ7ISYjFlaJa0=; h=Date:From:To:CC:Subject:In-Reply-To:References:From; b=mCQyQWBi0SM7JaCoktres1h++tAdWsgYATUvQJSWQXFQ/ruwIlV3Scl5HE1UhCxAl FYe9jefFvLK+iDaR0OWveIvTXLcH6OYQoOpDI+rGfVpjfGMCJl9J9OqxEOa0bPBns6 HWx0e99nycvPgrzb4VY6yclJ9Hf1PafpY9HdteZI= Received: from mx3.investici.org (unknown [127.0.0.1]) by latitanza.investici.org (Postfix) with ESMTP id 4YLp030HLNzGp3d; Sun, 29 Dec 2024 18:38:27 +0000 (UTC) Received: from [82.94.249.234] (mx3.investici.org [82.94.249.234]) (Authenticated sender: divya@subvertising.org) by localhost (Postfix) with ESMTPSA id 4YLp014FYfzGp3Z; Sun, 29 Dec 2024 18:38:25 +0000 (UTC) Date: Sun, 29 Dec 2024 18:38:17 +0000 From: Divya Ranjan User-Agent: Thunderbird for Android In-Reply-To: <86msggt66d.fsf@gnu.org> References: <8734k0cs1u.fsf@subvertising.org> <86zfm2jjbo.fsf@gnu.org> <865xo59hhm.fsf@gnu.org> <8634iqwqtr.fsf@gnu.org> <86msggt66d.fsf@gnu.org> Message-ID: <3C3AB452-B954-4A3B-9BAB-20209973E21C@subvertising.org> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary=----HU5UDVQ9LQSXY1TT2WXEZOJOQQQKYL Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=82.94.249.234; envelope-from=divya@subvertising.org; helo=latitanza.investici.org X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Spam-Score: -1.4 (-) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -2.4 (--) ------HU5UDVQ9LQSXY1TT2WXEZOJOQQQKYL Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Apologies Eli, I missed this thread! On 28 December 2024 11:09:46 GMT, Eli Zaretskii wrote: >Ping! Ping! Ping! Divya, please respond=2E > >> Cc: monnier@iro=2Eumontreal=2Eca, 74281@debbugs=2Egnu=2Eorg >> Date: Sat, 14 Dec 2024 11:34:40 +0200 >> From: Eli Zaretskii >>=20 >> Ping! Ping! Divya, are you there? >>=20 >> > Cc: 74281@debbugs=2Egnu=2Eorg >> > Date: Sat, 30 Nov 2024 11:51:49 +0200 >> > From: Eli Zaretskii >> >=20 >> > Ping! Divya, could you please try Stefan's suggestions and report >> > back? >> >=20 >> > > Cc: Divya Ranjan , 74281@debbugs=2Egnu=2E= org >> > > From: Stefan Monnier >> > > Date: Thu, 14 Nov 2024 11:56:37 -0500 >> > >=20 >> > > > Stefan, what tools do we have to investigate slowness related to >> > > > parse-partial-sexp? Or maybe you have suggestions for how to spe= ed up >> > > > font-lock in this case? >> > >=20 >> > > Hmm=2E=2E=2E `parse-partial-sexp` is normally expected to be fast, = unless it >> > > has to scan a lot of text=2E >> > >=20 >> > > > Here's the profile I get while moving with C-p through the above = file: >> > >=20 >> > > A stab in the dark, but maybe the relevant call is the one in: >> > >=20 >> > > (state (if (or syntax-ppss-table >> > > (not font-lock--syntax-table-affects-ppss)= ) >> > > (syntax-ppss start) >> > > ;; If `syntax-ppss' doesn't have its own syntax-= table and >> > > ;; we have installed our own syntax-table which >> > > ;; differs from the standard one in ways which a= ffects PPSS, >> > > ;; then we can't use `syntax-ppss' since that wo= uld pollute >> > > ;; and be polluted by its cache=2E >> > > (parse-partial-sexp (point-min) start))) >> > >=20 >> > > so the origin of the slowdown would be the (?#=2E "w 14") in the se= tting >> > > below in `scheme=2Eel`: >> > >=20 >> > > (setq font-lock-defaults >> > > '((scheme-font-lock-keywords >> > > scheme-font-lock-keywords-1 scheme-font-lock-keywords-2) >> > > nil t (("+-*/=2E<>=3D!?$%_&~^:" =2E "w") (?#=2E "w 14")) >> > > beginning-of-defun >> > > (font-lock-mark-block-function =2E mark-defun))) >> > >=20 >> > > in which case, setting a `syntax-ppss-table` should fix the problem= , tho >> > > we could also fix it by being more careful: AFAICT the purpose of t= his >> > > (?#=2E "w 14") is only to change the syntax of `#` from "prefix" to= "word" >> > > without changing the comment-related flags, so it shouldn't cause >> > > `font-lock--syntax-table-affects-ppss` to be set=2E >> > > So, we could solve it by improving the code that sets >> > > `font-lock--syntax-table-affects-ppss`, as in the patch below=2E >> > >=20 >> > >=20 >> > > Stefan >> > >=20 >> > >=20 >> > > diff --git a/lisp/font-lock=2Eel b/lisp/font-lock=2Eel >> > > index 203131bfd5a=2E=2Ef6299920c0a 100644 >> > > --- a/lisp/font-lock=2Eel >> > > +++ b/lisp/font-lock=2Eel >> > > @@ -1955,14 +1955,15 @@ font-lock-set-defaults >> > > (dolist (char (if (numberp (car selem)) >> > > (list (car selem)) >> > > (mapcar #'identity (car selem)))) >> > > - (unless (memq (car (aref font-lock-syntax-table char)) >> > > - '(1 2 3)) ;"=2E" "w" "_" >> > > - (setq font-lock--syntax-table-affects-ppss t)) >> > > - (modify-syntax-entry char syntax font-lock-syntax-table) >> > > - (unless (memq (car (aref font-lock-syntax-table char)) >> > > - '(1 2 3)) ;"=2E" "w" "_" >> > > - (setq font-lock--syntax-table-affects-ppss t)) >> > > - )))) >> > > + (let ((old-syntax (aref font-lock-syntax-table char))) >> > > + (modify-syntax-entry char syntax font-lock-syntax-table) >> > > + (let ((new-syntax (aref font-lock-syntax-table char))) >> > > + (unless (and (equal (cdr old-syntax) (cdr new-syntax)) >> > > + (memq (logand (car old-syntax) 255) '(1 2 = 3 6)) >> > > + (memq (logand (car new-syntax) 255) '(1 2 = 3 6)) >> > > + (equal (ash (car old-syntax) -8) >> > > + (ash (car new-syntax) -8))) >> > > + (setq font-lock--syntax-table-affects-ppss t)))))))) >> > > ;; (nth 4 defaults) used to hold `font-lock-beginning-of-syn= tax-function', >> > > ;; but that was removed in 25=2E1, so if it's a cons cell, w= e assume that >> > > ;; it's part of the variable alist=2E >> > >=20 >> > >=20 >> > >=20 >> > >=20 >> > >=20 >> >=20 >> >=20 >> >=20 >> >=20 >>=20 >>=20 >>=20 >>=20 > > > Divya Ranjan, Mathematics, Philosophy and Libre Software ------HU5UDVQ9LQSXY1TT2WXEZOJOQQQKYL Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Apologies Eli, I missed this thr= ead!


On 28 Decemb= er 2024 11:09:46 GMT, Eli Zaretskii <eliz@gnu=2Eorg> wrote:
Ping! Ping! Ping! Divya, please re=
spond=2E

Cc: monnier@iro=2Eumontreal=2Eca, 74281@debbugs=2Egnu=2EorgDate: Sat, 14 Dec 2024 11:34:40 +0200
From: Eli Zaretskii <eliz@gnu=
=2Eorg>

Ping! Ping!  Divya, are you there?

Cc: 74281@debbugs= =2Egnu=2Eorg
Date: Sat, 30 Nov 2024 11:51:49 +0200
From: Eli Zaretski= i <eliz@gnu=2Eorg>

Ping! Divya, could you please try Stefan's= suggestions and report
back?

Cc: Divya Ranjan <divya@subvertisi= ng=2Eorg>, 74281@debbugs=2Egnu=2Eorg
From: Stefan Monnier <monnier= @iro=2Eumontreal=2Eca>
Date: Thu, 14 Nov 2024 11:56:37 -0500

<= /div>
Ste= fan, what tools do we have to investigate slowness related to
parse-part= ial-sexp? Or maybe you have suggestions for how to speed up
font-lock i= n this case?

Hmm=2E=2E=2E `pars= e-partial-sexp` is normally expected to be fast, unless it
has to scan a= lot of text=2E

Here's the profile I get while moving with C-p through= the above file:

A stab in the = dark, but maybe the relevant call is the one in:

(state (i= f (or syntax-ppss-table
(not font-lock--syntax-= table-affects-ppss))
(syntax-ppss start)
= ;; If `syntax-ppss' doesn't have its own syntax-table and
= ;; we have installed our own syntax-table which
= ;; differs from the standard one in ways which affects PPSS, ;; then we can't use `syntax-ppss' since that would pol= lute
;; and be polluted by its cache=2E
= (parse-partial-sexp (point-min) start)))

so the origin of t= he slowdown would be the (?#=2E "w 14") in the setting
below in `scheme= =2Eel`:

(setq font-lock-defaults
'((scheme-font-lock-ke= ywords
scheme-font-lock-keywords-1 scheme-font-lock-keywords-= 2)
nil t (("+-*/=2E<>=3D!?$%_&~^:" =2E "w") (?#=2E "= w 14"))
beginning-of-defun
(font-lock-mark-block-= function =2E mark-defun)))

in which case, setting a `syntax-ppss-tab= le` should fix the problem, tho
we could also fix it by being more caref= ul: AFAICT the purpose of this
(?#=2E "w 14") is only to change the synt= ax of `#` from "prefix" to "word"
without changing the comment-related f= lags, so it shouldn't cause
`font-lock--syntax-table-affects-ppss` to be= set=2E
So, we could solve it by improving the code that sets
`font-l= ock--syntax-table-affects-ppss`, as in the patch below=2E


= Stefan


diff --git a/lisp/font-lock=2Eel b/lisp/font-lock=2Eel<= br>index 203131bfd5a=2E=2Ef6299920c0a 100644
--- a/lisp/font-lock=2Eel+++ b/lisp/font-lock=2Eel
@@ -1955,14 +1955,15 @@ font-lock-set-defaul= ts
(dolist (char (if (numberp (car selem))
(list (car= selem))
(mapcar #'identity (car selem))))
- (unless (m= emq (car (aref font-lock-syntax-table char))
- '(1 2= 3)) ;"=2E" "w" "_"
- (setq font-lock--syntax-table-affects-p= pss t))
- (modify-syntax-entry char syntax font-lock-syntax-table)=
- (unless (memq (car (aref font-lock-syntax-table char))
- = '(1 2 3)) ;"=2E" "w" "_"
- (setq font-lock--= syntax-table-affects-ppss t))
- ))))
+ (let ((old-syntax = (aref font-lock-syntax-table char)))
+ (modify-syntax-entry char= syntax font-lock-syntax-table)
+ (let ((new-syntax (aref font-l= ock-syntax-table char)))
+ (unless (and (equal (cdr old-syntax= ) (cdr new-syntax))
+ (memq (logand (car old-synt= ax) 255) '(1 2 3 6))
+ (memq (logand (car new-syn= tax) 255) '(1 2 3 6))
+ (equal (ash (car old-synt= ax) -8)
+ (ash (car new-syntax) -8)))
+= (setq font-lock--syntax-table-affects-ppss t))))))))
= ;; (nth 4 defaults) used to hold `font-lock-beginning-of-syntax-function',=
;; but that was removed in 25=2E1, so if it's a cons cell, we as= sume that
;; it's part of the variable alist=2E












<= br>

Divya Ranjan, M= athematics, Philosophy and Libre Software
------HU5UDVQ9LQSXY1TT2WXEZOJOQQQKYL-- From unknown Sun Jun 22 11:42:48 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74281: 30.0.91; font-lock mode hangs on scrolling large Scheme file Resent-From: Divya Ranjan Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 29 Dec 2024 18:44:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74281 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Stefan Monnier , Eli Zaretskii Cc: 74281@debbugs.gnu.org Received: via spool by 74281-submit@debbugs.gnu.org id=B74281.173549779126696 (code B ref 74281); Sun, 29 Dec 2024 18:44:02 +0000 Received: (at 74281) by debbugs.gnu.org; 29 Dec 2024 18:43:11 +0000 Received: from localhost ([127.0.0.1]:56156 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tRyFq-0006wW-Ez for submit@debbugs.gnu.org; Sun, 29 Dec 2024 13:43:10 -0500 Received: from latitanza.investici.org ([82.94.249.234]:65181) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tRyFn-0006wK-QI for 74281@debbugs.gnu.org; Sun, 29 Dec 2024 13:43:08 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=subvertising.org; s=stigmate; t=1735497787; bh=EVC4njjfs4+C//JwjNuh5HXU8mzdnFu2fRH/+rp013I=; h=Date:From:To:CC:Subject:In-Reply-To:References:From; b=lXuFic/eyiBNRCO74QlRC3UqMw6CW4+Dq9wm/Ordjw8FJ1eNJHEJ/K4wSqHuLSv8m tOyste3BTTRv2Dv/x0GJf3rbSK6IaMOrk61FKvdRvVvrQyL40clfY6NtYXuUbwB41T ZVW4WU/lWoCAXVIfJ1F3PkbF9Pk27nemo2LW4RYY= Received: from mx3.investici.org (unknown [127.0.0.1]) by latitanza.investici.org (Postfix) with ESMTP id 4YLp5R38FCzGp3n; Sun, 29 Dec 2024 18:43:07 +0000 (UTC) Received: from [82.94.249.234] (mx3.investici.org [82.94.249.234]) (Authenticated sender: divya@subvertising.org) by localhost (Postfix) with ESMTPSA id 4YLp5Q11t7zGp3Z; Sun, 29 Dec 2024 18:43:05 +0000 (UTC) Date: Sun, 29 Dec 2024 18:43:01 +0000 From: Divya Ranjan User-Agent: Thunderbird for Android In-Reply-To: References: <8734k0cs1u.fsf@subvertising.org> <86zfm2jjbo.fsf@gnu.org> <865xo59hhm.fsf@gnu.org> <86a5cfsr6a.fsf@gnu.org> Message-ID: <66CF0D14-5C95-47C8-B96E-FB1DEE0BD065@subvertising.org> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary=----8RUTH3QLEPAGGMGVUDZFECCU401W0G Content-Transfer-Encoding: 7bit X-Spam-Score: -0.7 (/) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -1.7 (-) ------8RUTH3QLEPAGGMGVUDZFECCU401W0G Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable I recently did a build of `master`, I don't think the bug was fixed=2E Have= you tested with `tex=2Eel`? On 29 December 2024 15:20:19 GMT, Stefan Monnier wrote: >>> > Ping! Divya, could you please try Stefan's suggestions and report >>> > back? >>> FWIW, I think the change is an improvement in any case, so we could >>> install it=2E Since it's in a "core" file, it might be too risky for >>> `emacs-30`, so I'm thinking of installing it in `master`, WDYT? >> Fine by me, thanks=2E > >Pushed to `master`, thanks=2E > > > Stefan > Divya Ranjan, Mathematics, Philosophy and Libre Software ------8RUTH3QLEPAGGMGVUDZFECCU401W0G Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
I recently did a build of `maste= r`, I don't think the bug was fixed=2E Have you tested with `tex=2Eel`?

On 29 December 2024 = 15:20:19 GMT, Stefan Monnier <monnier@iro=2Eumontreal=2Eca> wrote:
Ping!  Divya, could you please try St=
efan's suggestions and report
back?
FWIW, I think the change is an improvement in any case, so we could
=
install it=2E  Since it's in a "core" file, it might be too risky for
`e=
macs-30`, so I'm thinking of installing it in `master`, WDYT?
Fine by me, thanks=2E

Pushed to `master`, thanks=2E


        Stefan
Divya Ranjan, Mathem= atics, Philosophy and Libre Software
------8RUTH3QLEPAGGMGVUDZFECCU401W0G-- From unknown Sun Jun 22 11:42:48 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74281: 30.0.91; font-lock mode hangs on scrolling large Scheme file Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 29 Dec 2024 18:59:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74281 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Stefan Monnier Cc: divya@subvertising.org, 74281@debbugs.gnu.org Received: via spool by 74281-submit@debbugs.gnu.org id=B74281.173549872529238 (code B ref 74281); Sun, 29 Dec 2024 18:59:02 +0000 Received: (at 74281) by debbugs.gnu.org; 29 Dec 2024 18:58:45 +0000 Received: from localhost ([127.0.0.1]:56176 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tRyUu-0007bW-K4 for submit@debbugs.gnu.org; Sun, 29 Dec 2024 13:58:44 -0500 Received: from eggs.gnu.org ([209.51.188.92]:57900) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tRyUs-0007bI-4U for 74281@debbugs.gnu.org; Sun, 29 Dec 2024 13:58:43 -0500 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tRyUm-0007Gw-84; Sun, 29 Dec 2024 13:58:36 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=f20lHdyn4bV1ZZfupQb+fIu2DIWSmqK6LcgVd7DKFJI=; b=VhgBf2FUyD2R kwIsyaxffnHKEFXedykWiwqVWg/oVyY/feEn/cAj4xv3f1UrOOjwQfBLLQ1JcHCpIBzI48czWDlCN OqBjsNvsaOLuUUiP1QR/MjSpdSTd0JHjrjurin2aus95DN9fVTZztadksilW8tWI1PKlan5EsUshx XMXHPDEEmQ9k4XjgQpX8Jv0z5s55aNRlaYksUWZgQJrcS43wRjuCp25tuGJh6gJXQrHXZv8w0bwTf CEgKVuD/WKTLsakG80aBtPIDxoCVjhTBXgTo7sMy0xYz4HW7CccAsASiyayoj3oJ5CYUdryzmF5hl H1Y12TXvBDWhXNrgnXeTIQ==; Date: Sun, 29 Dec 2024 20:58:31 +0200 Message-Id: <86v7v2pb8o.fsf@gnu.org> From: Eli Zaretskii In-Reply-To: (message from Stefan Monnier on Sun, 29 Dec 2024 13:01:14 -0500) References: <8734k0cs1u.fsf@subvertising.org> <86zfm2jjbo.fsf@gnu.org> <865xo59hhm.fsf@gnu.org> <86a5cfsr6a.fsf@gnu.org> X-Spam-Score: -2.3 (--) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) > From: Stefan Monnier > Cc: divya@subvertising.org, 74281@debbugs.gnu.org > Date: Sun, 29 Dec 2024 13:01:14 -0500 > > BTW, if we want something on `emacs-30`, we could go with a patch like > the one below. > > > Stefan > > > diff --git a/lisp/progmodes/scheme.el b/lisp/progmodes/scheme.el > index a0f922f279c..c46422b7218 100644 > --- a/lisp/progmodes/scheme.el > +++ b/lisp/progmodes/scheme.el > @@ -201,7 +201,10 @@ scheme-mode-variables > scheme-font-lock-keywords-1 scheme-font-lock-keywords-2) > nil t (("+-*/.<>=!?$%_&~^:" . "w") (?#. "w 14")) > beginning-of-defun > - (font-lock-mark-block-function . mark-defun))) > + (font-lock-mark-block-function . mark-defun) > + ;; The (?#. "w 14") above causes font-lock to incorrectly > + ;; set `font-lock--syntax-table-affects-ppss' to t. > + (font-lock--syntax-table-affects-ppss . nil))) > (setq-local prettify-symbols-alist lisp-prettify-symbols-alist) > (setq-local lisp-doc-string-elt-property 'scheme-doc-string-elt)) What does it do, and what potential harm could happen if we install this? From unknown Sun Jun 22 11:42:48 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74281: 30.0.91; font-lock mode hangs on scrolling large Scheme file Resent-From: Stefan Monnier Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 29 Dec 2024 20:03:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74281 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Eli Zaretskii Cc: divya@subvertising.org, 74281@debbugs.gnu.org Received: via spool by 74281-submit@debbugs.gnu.org id=B74281.17355025248714 (code B ref 74281); Sun, 29 Dec 2024 20:03:02 +0000 Received: (at 74281) by debbugs.gnu.org; 29 Dec 2024 20:02:04 +0000 Received: from localhost ([127.0.0.1]:56303 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tRzUC-0002GU-2s for submit@debbugs.gnu.org; Sun, 29 Dec 2024 15:02:04 -0500 Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:44710) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tRzU9-0002Fm-K4 for 74281@debbugs.gnu.org; Sun, 29 Dec 2024 15:02:02 -0500 Received: from pmg2.iro.umontreal.ca (localhost.localdomain [127.0.0.1]) by pmg2.iro.umontreal.ca (Proxmox) with ESMTP id E986180329; Sun, 29 Dec 2024 15:01:54 -0500 (EST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1735502509; bh=AIggM/D9rW5/ObZdIn9LpOEPMmiMUnsRw03/DVeCaqY=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=QucGayWkKKyIguH3VOI4jKlc4J160BdLBhWpCTUExgAhGsU5MveWLdqrroGdJvpjK LSevIiGVEJpdV7y/Hh1Y/2XPgUCE7KCUFWKRphl/qO7bG1L4bCTGFiR8yC+yb860w9 zT1rvA4c16/wjq3GKrdwfszYgilP2jDzh2TqDdm7aeYaAFvtrLd8ISbXK9r6At/Qpa H5ma0ZPZcQuNq5sDctvSSwYbKqK17id0u3YxNf4nNlO1HvBUnffKruQ/PqlO7MMpwM mlluplvV2tvjJ48Pj+VprztpoQU5SWW5bhzoLGXd6oSxflVRymPIhWviVE5ia6LVd7 koJZ7omlmsosQ== Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg2.iro.umontreal.ca (Proxmox) with ESMTP id CB6968001E; Sun, 29 Dec 2024 15:01:49 -0500 (EST) Received: from pastel (104-195-225-43.cpe.teksavvy.com [104.195.225.43]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id 99616120280; Sun, 29 Dec 2024 15:01:49 -0500 (EST) From: Stefan Monnier In-Reply-To: <86v7v2pb8o.fsf@gnu.org> (Eli Zaretskii's message of "Sun, 29 Dec 2024 20:58:31 +0200") Message-ID: References: <8734k0cs1u.fsf@subvertising.org> <86zfm2jjbo.fsf@gnu.org> <865xo59hhm.fsf@gnu.org> <86a5cfsr6a.fsf@gnu.org> <86v7v2pb8o.fsf@gnu.org> Date: Sun, 29 Dec 2024 15:01:49 -0500 User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-SPAM-INFO: Spam detection results: 0 ALL_TRUSTED -1 Passed through trusted hosts only via SMTP AWL -0.060 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% DKIM_SIGNED 0.1 Message has a DKIM or DK signature, not necessarily valid DKIM_VALID -0.1 Message has at least one valid DKIM or DK signature DKIM_VALID_AU -0.1 Message has a valid DKIM or DK signature from author's domain DKIM_VALID_EF -0.1 Message has a valid DKIM or DK signature from envelope-from domain X-SPAM-LEVEL: X-Spam-Score: -2.3 (--) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) >> diff --git a/lisp/progmodes/scheme.el b/lisp/progmodes/scheme.el >> index a0f922f279c..c46422b7218 100644 >> --- a/lisp/progmodes/scheme.el >> +++ b/lisp/progmodes/scheme.el >> @@ -201,7 +201,10 @@ scheme-mode-variables >> scheme-font-lock-keywords-1 scheme-font-lock-keywords-2) >> nil t (("+-*/.<>=!?$%_&~^:" . "w") (?#. "w 14")) >> beginning-of-defun >> - (font-lock-mark-block-function . mark-defun))) >> + (font-lock-mark-block-function . mark-defun) >> + ;; The (?#. "w 14") above causes font-lock to incorrectly >> + ;; set `font-lock--syntax-table-affects-ppss' to t. >> + (font-lock--syntax-table-affects-ppss . nil))) >> (setq-local prettify-symbols-alist lisp-prettify-symbols-alist) >> (setq-local lisp-doc-string-elt-property 'scheme-doc-string-elt)) > > What does it do, This variable controls whether font-lock uses `syntax-ppss` or not. By setting to nil, it lets font-lock use `syntax-ppss` which means that on large buffers it tends to be much faster because it doesn't need to `parse-partial-sexp` all the way from `point-min` every time. > and what potential harm could happen if we install this? If it's set incorrectly, it can lead to messed up `syntax-ppss` state (because some calls use one syntax table and others use another) which could lead to mis-indentation, mis-fontification, incorrect highlighting of matched paren, incorrect buffer navigation, etc... Of course, these risks are confined to those buffers that use `scheme-mode` or a mode that derives from it. I believe the setting is correct for `scheme-mode`, but it's possible that some derived mode changes the `font-lock-syntax-table` and relies (incorrectly) on `scheme-mode` having already set `font-lock--syntax-table-affects-ppss` to t. This said, AFAICT this performance problem has been with us since Emacs-28 (commit cdadb7a97cbe), so it's not super urgent to fix it. I think we're fine with the fix on `master`. It would be nice to get confirmation from Divya that it does fix the problem he sees. Stefan From unknown Sun Jun 22 11:42:48 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74281: 30.0.91; font-lock mode hangs on scrolling large Scheme file Resent-From: Stefan Monnier Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 30 Dec 2024 04:46:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74281 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Divya Ranjan Cc: Eli Zaretskii , 74281@debbugs.gnu.org Received: via spool by 74281-submit@debbugs.gnu.org id=B74281.17355339301918 (code B ref 74281); Mon, 30 Dec 2024 04:46:02 +0000 Received: (at 74281) by debbugs.gnu.org; 30 Dec 2024 04:45:30 +0000 Received: from localhost ([127.0.0.1]:56933 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tS7ek-0000Us-6m for submit@debbugs.gnu.org; Sun, 29 Dec 2024 23:45:30 -0500 Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:42585) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tS7eh-0000UX-SY for 74281@debbugs.gnu.org; Sun, 29 Dec 2024 23:45:28 -0500 Received: from pmg1.iro.umontreal.ca (localhost.localdomain [127.0.0.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id BBA91100055; Sun, 29 Dec 2024 23:45:20 -0500 (EST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1735533919; bh=XFlC1J6UHIhMsC20lD7v40x0Cd1P1MG+C9+qVS+EYHs=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=M67uDpCyDp3yJzahOJYmSVgswhOgq9UdE5qEYPWVEUi3HbXqExOTCQXyc3DRtHvY9 J3mPwHw6IkQEiQ0zdcZmHaIObrl+VRLJR/3Iuhi9GEI21+xCNeXVpTEb78eA1QTxMk V2YpiODeZSUjD0eYiekUqG+bmBXzCuEI+P2uhUcBNY5wOZStZtMcbaZoAAWU1TUs3a zuu/eqGcA8R90PvEMgBkBDWbb2HFDL3Yw3eiaPOxSplPT+Ik6X9OKbtgC2BeTTbfnZ 0hNW5zXgZDjvigbKDL++xKPVSeOjCw1f6t14umKMmnn2IcP8eRLhrxIAQy1B2TqTiR LIvxB2tLTjjMw== Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id E751D100043; Sun, 29 Dec 2024 23:45:19 -0500 (EST) Received: from pastel (104-195-225-43.cpe.teksavvy.com [104.195.225.43]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id BA1F9120611; Sun, 29 Dec 2024 23:45:19 -0500 (EST) From: Stefan Monnier In-Reply-To: <66CF0D14-5C95-47C8-B96E-FB1DEE0BD065@subvertising.org> (Divya Ranjan's message of "Sun, 29 Dec 2024 18:43:01 +0000") Message-ID: References: <8734k0cs1u.fsf@subvertising.org> <86zfm2jjbo.fsf@gnu.org> <865xo59hhm.fsf@gnu.org> <86a5cfsr6a.fsf@gnu.org> <66CF0D14-5C95-47C8-B96E-FB1DEE0BD065@subvertising.org> Date: Sun, 29 Dec 2024 23:45:19 -0500 User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-SPAM-INFO: Spam detection results: 0 ALL_TRUSTED -1 Passed through trusted hosts only via SMTP AWL -0.536 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% DKIM_SIGNED 0.1 Message has a DKIM or DK signature, not necessarily valid DKIM_VALID -0.1 Message has at least one valid DKIM or DK signature DKIM_VALID_AU -0.1 Message has a valid DKIM or DK signature from author's domain DKIM_VALID_EF -0.1 Message has a valid DKIM or DK signature from envelope-from domain X-SPAM-LEVEL: X-Spam-Score: -2.3 (--) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) > I recently did a build of `master`, I don't think the bug was fixed. > Have you tested with `tex.el`? Your bug report was about Scheme files. If you see the "same" problem for (La)TeX files, I think it would be best to open a new bug report for it. IIRC, `font-lock--syntax-table-affects-ppss` can't be nil in `latex-mode` (or at least it's not clear how to do that without breaking something) because of how $...$ is paired (which doesn't always obey the nesting of braces). Stefan From unknown Sun Jun 22 11:42:48 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74281: 30.0.91; font-lock mode hangs on scrolling large Scheme file Resent-From: Divya Ranjan Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 30 Dec 2024 05:36:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74281 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: monnier@iro.umontreal.ca, 74281@debbugs.gnu.org Cc: eliz@gnu.org X-Debbugs-Original-To: Stefan Monnier , "Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors" X-Debbugs-Original-Cc: Eli Zaretskii , 74281@debbugs.gnu.org Received: via spool by submit@debbugs.gnu.org id=B.173553696111395 (code B ref -1); Mon, 30 Dec 2024 05:36:02 +0000 Received: (at submit) by debbugs.gnu.org; 30 Dec 2024 05:36:01 +0000 Received: from localhost ([127.0.0.1]:57011 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tS8Rc-0002xj-K0 for submit@debbugs.gnu.org; Mon, 30 Dec 2024 00:36:01 -0500 Received: from lists.gnu.org ([209.51.188.17]:37968) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tS8Rb-0002xa-3U for submit@debbugs.gnu.org; Mon, 30 Dec 2024 00:35:59 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tS8Ra-0004pp-Jd for bug-gnu-emacs@gnu.org; Mon, 30 Dec 2024 00:35:58 -0500 Received: from latitanza.investici.org ([82.94.249.234]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tS8RX-0002k8-Pq; Mon, 30 Dec 2024 00:35:57 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=subvertising.org; s=stigmate; t=1735536953; bh=JQ4oZG49HCxfgJNEnVujYjRt9isfkBtUHBYSaQf7MHM=; h=Date:From:To:CC:Subject:In-Reply-To:References:From; b=Nr2JvzsrodFbjBOKIwpMjHPkHOopow36Obmn96TqvIPEhBmEsOPNHrT0TEYi2AXmd W2Dmu21De+aAHnQkZuQIQLWteAkySn4HqD2sI4SP3K4DphGutJPo6THW9+cu5Xb2CZ 5x3N5WD9CgtSsNWM6sNw27vRgjAH+FXbsOMeRRwU= Received: from mx3.investici.org (unknown [127.0.0.1]) by latitanza.investici.org (Postfix) with ESMTP id 4YM4Zd1T2hzGp44; Mon, 30 Dec 2024 05:35:53 +0000 (UTC) Received: from [82.94.249.234] (mx3.investici.org [82.94.249.234]) (Authenticated sender: divya@subvertising.org) by localhost (Postfix) with ESMTPSA id 4YM4Zc2hgbzGp40; Mon, 30 Dec 2024 05:35:52 +0000 (UTC) Date: Mon, 30 Dec 2024 05:35:48 +0000 From: Divya Ranjan User-Agent: Thunderbird for Android In-Reply-To: References: <8734k0cs1u.fsf@subvertising.org> <86zfm2jjbo.fsf@gnu.org> <865xo59hhm.fsf@gnu.org> <86a5cfsr6a.fsf@gnu.org> <66CF0D14-5C95-47C8-B96E-FB1DEE0BD065@subvertising.org> Message-ID: <6A6B56C8-2635-4FDA-82F6-A63BD22238CC@subvertising.org> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary=----AM2DW7FZNQGDOIT8CKNLLTF0IOPEZ8 Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=82.94.249.234; envelope-from=divya@subvertising.org; helo=latitanza.investici.org X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Spam-Score: -1.4 (-) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -2.4 (--) ------AM2DW7FZNQGDOIT8CKNLLTF0IOPEZ8 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Apologies, I mistyped during travelling, the file I was referring to was th= e original file of the bug report=2E `tex=2Escm` is the file from the Guix = source tree: /gnu/packages/tex=2Escm Regards, On 30 December 2024 04:45:19 GMT, "Stefan Monnier via Bug reports for GNU = Emacs, the Swiss army knife of text editors" wrot= e: >> I recently did a build of `master`, I don't think the bug was fixed=2E >> Have you tested with `tex=2Eel`? > >Your bug report was about Scheme files=2E >If you see the "same" problem for (La)TeX files, I think it would be >best to open a new bug report for it=2E > >IIRC, `font-lock--syntax-table-affects-ppss` can't be nil in >`latex-mode` (or at least it's not clear how to do that without breaking >something) because of how $=2E=2E=2E$ is paired (which doesn't always obe= y the >nesting of braces)=2E > > > Stefan > > > > Divya Ranjan, Mathematics, Philosophy and Libre Software ------AM2DW7FZNQGDOIT8CKNLLTF0IOPEZ8 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Apologies, I mistyped during tra= velling, the file I was referring to was the original file of the bug repor= t=2E `tex=2Escm` is the file from the Guix source tree: /gnu/packages/tex= =2Escm

Regards,


On 30 December 2024 04:45:19 GMT, "Stefan Monnier via Bug reports for= GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu=2Eo= rg> wrote:
I recently did a build of `master`, I don't think the bug wa=
s fixed=2E
Have you tested with `tex=2Eel`?

Your bug report was about Scheme files=2E
If you see the= "same" problem for (La)TeX files, I think it would be
best to open a ne= w bug report for it=2E

IIRC, `font-lock--syntax-table-affects-ppss` = can't be nil in
`latex-mode` (or at least it's not clear how to do that = without breaking
something) because of how $=2E=2E=2E$ is paired (which = doesn't always obey the
nesting of braces)=2E


Stefan<= br>



Divya R= anjan, Mathematics, Philosophy and Libre Software
------AM2DW7FZNQGDOIT8CKNLLTF0IOPEZ8-- From unknown Sun Jun 22 11:42:48 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74281: 30.0.91; font-lock mode hangs on scrolling large Scheme file Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 30 Dec 2024 12:48:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74281 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Stefan Monnier Cc: divya@subvertising.org, 74281@debbugs.gnu.org Received: via spool by 74281-submit@debbugs.gnu.org id=B74281.173556284830241 (code B ref 74281); Mon, 30 Dec 2024 12:48:02 +0000 Received: (at 74281) by debbugs.gnu.org; 30 Dec 2024 12:47:28 +0000 Received: from localhost ([127.0.0.1]:57708 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tSFBA-0007rf-6C for submit@debbugs.gnu.org; Mon, 30 Dec 2024 07:47:28 -0500 Received: from eggs.gnu.org ([209.51.188.92]:35252) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tSFB7-0007rP-Jn for 74281@debbugs.gnu.org; Mon, 30 Dec 2024 07:47:26 -0500 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tSFB0-0007dS-Et; Mon, 30 Dec 2024 07:47:18 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=pw/5rw05Z7Nbk40sErkrP5fMkVONCxZ6vGOqF2pkjQg=; b=EQMrw7YhpLvm LhbXW3vCkuaGDJtOMZOIf7QHkmbgU9In9VHq7TnDLMTrroEQMe5hePMT813SxQif8GjITmlOFNOyn uK1v0NywrqFjvXnp87WTYqu0xLbNQqMhMCk3u9upSi14qi2CGQ1IoxGRmTOsVYf/ZlNWCuziQSj8C nbCJuxIDSYDR7ucW9n9PnZwhFuH085o7dEW4pphB04cJQQH4IayJlRxLcqZIKmKexXW7nYelT/Bfc Dn9erExcbwB4TDaiFeeKFbVBmK93aHXhQ7Pt/j96faifVPdF6aunQ51DnRKZKUw2DUVCpVpvti/6q B20eBe9gAlxb9Ae0n/z9jQ==; Date: Mon, 30 Dec 2024 14:47:15 +0200 Message-Id: <86h66lpcbw.fsf@gnu.org> From: Eli Zaretskii In-Reply-To: (message from Stefan Monnier on Sun, 29 Dec 2024 15:01:49 -0500) References: <8734k0cs1u.fsf@subvertising.org> <86zfm2jjbo.fsf@gnu.org> <865xo59hhm.fsf@gnu.org> <86a5cfsr6a.fsf@gnu.org> <86v7v2pb8o.fsf@gnu.org> X-Spam-Score: -2.3 (--) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) > From: Stefan Monnier > Cc: divya@subvertising.org, 74281@debbugs.gnu.org > Date: Sun, 29 Dec 2024 15:01:49 -0500 > > This said, AFAICT this performance problem has been with us since > Emacs-28 (commit cdadb7a97cbe), so it's not super urgent to fix it. > I think we're fine with the fix on `master`. Agreed. We can later consider backporting to Emacs 30.2. > It would be nice to get confirmation from Divya that it does fix the > problem he sees. Right. From unknown Sun Jun 22 11:42:48 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74281: 30.0.91; font-lock mode hangs on scrolling large Scheme file Resent-From: Stefan Monnier Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 30 Dec 2024 21:07:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74281 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Divya Ranjan Cc: eliz@gnu.org, 74281@debbugs.gnu.org Received: via spool by 74281-submit@debbugs.gnu.org id=B74281.173559278929779 (code B ref 74281); Mon, 30 Dec 2024 21:07:01 +0000 Received: (at 74281) by debbugs.gnu.org; 30 Dec 2024 21:06:29 +0000 Received: from localhost ([127.0.0.1]:60207 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tSMy5-0007kF-Ea for submit@debbugs.gnu.org; Mon, 30 Dec 2024 16:06:29 -0500 Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:59757) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tSMy1-0007jy-Lw for 74281@debbugs.gnu.org; Mon, 30 Dec 2024 16:06:28 -0500 Received: from pmg3.iro.umontreal.ca (localhost [127.0.0.1]) by pmg3.iro.umontreal.ca (Proxmox) with ESMTP id 81189441D2B; Mon, 30 Dec 2024 16:06:14 -0500 (EST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1735592767; bh=f2lTCP/y5dgfD1QhMIelo+HX0KcCGyv+ZXgwBJXKrVM=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=n3FvIEGTNfHqMW4Y7reIb6GsyBMgSPOk8Ho4A3bymXgirCNlO77ytVHmG9eky5yaI nCeY56ixjQxKW6OQyHJ9Y9S5ZaTI5Jq5dPMESGObijQ6Dkl4BB6iKW55SS4+4iRWHe D/B3az0KRVZgYFlzKGssSWUPkiFbsO+yJzTmiwbYIoU77GtmQWLBMcqelfWjk/DC9/ WKJaMc7yscE65RqWGAtrteaUalZSuGrxwuQqPWJbaTRKvA7DiaeFb0nlCpnqRgEwC/ wxLEa5nGEmjpyockDiu2yLZFODgiQFeQFc0gjTcw8z21dmBqXzh0prh1gewfWl5bXG 9B4os4n8bHXyA== Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg3.iro.umontreal.ca (Proxmox) with ESMTP id D1E3E441DA1; Mon, 30 Dec 2024 16:06:07 -0500 (EST) Received: from alfajor (modemcable005.21-80-70.mc.videotron.ca [70.80.21.5]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id A6BD91203A5; Mon, 30 Dec 2024 16:06:07 -0500 (EST) From: Stefan Monnier In-Reply-To: <6A6B56C8-2635-4FDA-82F6-A63BD22238CC@subvertising.org> (Divya Ranjan's message of "Mon, 30 Dec 2024 05:35:48 +0000") Message-ID: References: <8734k0cs1u.fsf@subvertising.org> <86zfm2jjbo.fsf@gnu.org> <865xo59hhm.fsf@gnu.org> <86a5cfsr6a.fsf@gnu.org> <66CF0D14-5C95-47C8-B96E-FB1DEE0BD065@subvertising.org> <6A6B56C8-2635-4FDA-82F6-A63BD22238CC@subvertising.org> Date: Mon, 30 Dec 2024 16:06:06 -0500 User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-SPAM-INFO: Spam detection results: 0 ALL_TRUSTED -1 Passed through trusted hosts only via SMTP AWL 0.048 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% DKIM_SIGNED 0.1 Message has a DKIM or DK signature, not necessarily valid DKIM_VALID -0.1 Message has at least one valid DKIM or DK signature DKIM_VALID_AU -0.1 Message has a valid DKIM or DK signature from author's domain DKIM_VALID_EF -0.1 Message has a valid DKIM or DK signature from envelope-from domain X-SPAM-LEVEL: X-Spam-Score: -2.3 (--) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) > Apologies, I mistyped during travelling, the file I was referring to was the > original file of the bug report. `tex.scm` is the file from the Guix source > tree: /gnu/packages/tex.scm Hmm... on my tests, I can reproduce in `emacs-30` the very slow font-locking you described when we're at the end of the buffer, but not on `master`. Just to confirm that you're running the "right" code, can you do `M-: font-lock--syntax-table-affects-ppss RET` from within that `tex.scm` buffer? It should return nil if my fix was applied. If it returns t then you're presumably still using the old code (or there's something else amiss). If it returns something else than nil or t then there's something else amiss. FWIW, even with the fix, Emacs is not quite able to keep up with `M-v` with an auto-repeat of 40/s when done from the end of the buffer, but: - When I release the key it catches up fairly quickly (hence the "not quite"). So I wouldn't describe it as "hangs". - This is on my 16 years old 2.5GHz Core 2 Duo (Thinkpad T61). - It's an Emacs compiled with `-Og` and with `--enable-checking`. Stefan From unknown Sun Jun 22 11:42:48 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74281: 30.0.91; font-lock mode hangs on scrolling large Scheme file Resent-From: divya@subvertising.org Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 02 Jan 2025 14:13:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74281 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: 74281@debbugs.gnu.org X-Debbugs-Original-To: bug-gnu-emacs@gnu.org Received: via spool by submit@debbugs.gnu.org id=B.17358271418681 (code B ref -1); Thu, 02 Jan 2025 14:13:01 +0000 Received: (at submit) by debbugs.gnu.org; 2 Jan 2025 14:12:21 +0000 Received: from localhost ([127.0.0.1]:43270 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tTLvx-0002Fx-Af for submit@debbugs.gnu.org; Thu, 02 Jan 2025 09:12:21 -0500 Received: from lists.gnu.org ([2001:470:142::17]:50076) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from ) id 1tTLvu-0002Fj-Jf for submit@debbugs.gnu.org; Thu, 02 Jan 2025 09:12:19 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tTLvo-0004vr-Rm for bug-gnu-emacs@gnu.org; Thu, 02 Jan 2025 09:12:12 -0500 Received: from latitanza.investici.org ([2001:888:2000:56::19]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tTLvn-0005Wr-02 for bug-gnu-emacs@gnu.org; Thu, 02 Jan 2025 09:12:12 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=subvertising.org; s=stigmate; t=1735827127; bh=C6x+IzifTrjUhoikKTB5qgBHDWPcuPja/LDWVU8x/ek=; h=Date:From:To:Subject:In-Reply-To:References:From; b=eJt1ybeiPp4zZ1UUH4axJXHDfkNdkHSJPmu/3kMFSuFXDyAKOR2bpGr1maOqEm69k HdYooo7qJnWOjqoHAOKFLyISuGfN4s0+bKElR2rWYOeYipIoWJgkr5SqBrz8Lqk++e MYyhPO1Ca1ROyKjW+xS2HllI553izfMhvvBxvxwQ= Received: from 2.mail-backend.investici.org (unknown [10.0.0.12]) by latitanza.investici.org (Postfix) with ESMTP id 4YP7tv1WYFzGp3t for ; Thu, 2 Jan 2025 14:12:07 +0000 (UTC) Received: from 2.webmail.investici.org (localhost [127.0.0.1]) (Authenticated sender: divya@subvertising.org) by 2.mail-backend.investici.org (Postfix) with ESMTPA id 4YP7tv0XMdz2xGF for ; Thu, 2 Jan 2025 14:12:06 +0000 (UTC) MIME-Version: 1.0 Date: Thu, 02 Jan 2025 14:12:06 +0000 From: divya@subvertising.org In-Reply-To: References: <8734k0cs1u.fsf@subvertising.org> <86zfm2jjbo.fsf@gnu.org> <865xo59hhm.fsf@gnu.org> <86a5cfsr6a.fsf@gnu.org> <66CF0D14-5C95-47C8-B96E-FB1DEE0BD065@subvertising.org> <6A6B56C8-2635-4FDA-82F6-A63BD22238CC@subvertising.org> User-Agent: Roundcube Webmail Message-ID: X-Sender: divya@subvertising.org Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=2001:888:2000:56::19; envelope-from=divya@subvertising.org; helo=latitanza.investici.org X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Spam-Score: 0.9 (/) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -0.1 (/) Hello again Stefan and Happy GNU/Year. > Hmm... on my tests, I can reproduce in `emacs-30` the very slow > font-locking you described when we're at the end of the buffer, but not > on `master`. Just to confirm that you're running the "right" code, can > you do `M-: font-lock--syntax-table-affects-ppss RET` from within that > `tex.scm` buffer? It should return nil if my fix was applied. If it > returns t then you're presumably still using the old code (or there's > something else amiss). If it returns something else than nil or t then > there's something else amiss. I just checked and my compiled build was of an older commit. The variable was set `t`. I built from the latest commit and indeed now I can scroll flawlessly in the reported file. > FWIW, even with the fix, Emacs is not quite able to keep up with `M-v` > with an auto-repeat of 40/s when done from the end of the buffer, but: > - When I release the key it catches up fairly quickly (hence the "not > quite"). So I wouldn't describe it as "hangs". > - This is on my 16 years old 2.5GHz Core 2 Duo (Thinkpad T61). > - It's an Emacs compiled with `-Og` and with `--enable-checking`. That's reasonable for the system. I do not notice any sort of lag with `M-v` on my system (Ryzen 7 5700G). Thank you Eli and Stefan for the prompt fix. Really admire the work you guys do. Regards, Divya Ranjan, Mathematics, Philosophy and Libre Software From unknown Sun Jun 22 11:42:48 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74281: 30.0.91; font-lock mode hangs on scrolling large Scheme file Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 04 Jan 2025 13:11:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74281 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: divya@subvertising.org, Stefan Monnier Cc: 74281@debbugs.gnu.org Received: via spool by 74281-submit@debbugs.gnu.org id=B74281.173599622428197 (code B ref 74281); Sat, 04 Jan 2025 13:11:01 +0000 Received: (at 74281) by debbugs.gnu.org; 4 Jan 2025 13:10:24 +0000 Received: from localhost ([127.0.0.1]:53869 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tU3v2-0007Kc-7b for submit@debbugs.gnu.org; Sat, 04 Jan 2025 08:10:24 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:40574) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from ) id 1tU3v0-0007KO-Jm for 74281@debbugs.gnu.org; Sat, 04 Jan 2025 08:10:19 -0500 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tU3ut-0000Qf-6x; Sat, 04 Jan 2025 08:10:12 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=3Xrxk+6FXraTPBQrPsKELqToCAz4Rbgbxj+snPildNM=; b=e891ueW1e8pL +PaUhxacL+nK6ZNMgQlQ60+3JatLFC3NKkjvxeUWG1bZb1oQEQ0yUttSCIykSqgzHDltOdN7eqw36 qL6gp9fiJzHbqtif6goohL/1bCsUdHZRJEYMIlnG7nb8KOgO1Nmrt9vogkPhy4RwF2Yo+3CKKWorq m2MLABOP6llvtYnaeFxSm03kQYqLqivItlIJebiu5oRY2K8gBPtLFV0kh7+0WueQX6u5bWfmRPU2E hj46Os+3vBujG7EgO8A3MOXfxb0E/EYLQ0kLxXya8/C6koaed3b5yC8dyfHSGAqXufDXm89Jsz15s AK+nUbHJJ5BLel5PYlzd3A==; Date: Sat, 04 Jan 2025 15:10:06 +0200 Message-Id: <86ttaed8sx.fsf@gnu.org> From: Eli Zaretskii In-Reply-To: (bug-gnu-emacs@gnu.org) References: <8734k0cs1u.fsf@subvertising.org> <86zfm2jjbo.fsf@gnu.org> <865xo59hhm.fsf@gnu.org> <86a5cfsr6a.fsf@gnu.org> <66CF0D14-5C95-47C8-B96E-FB1DEE0BD065@subvertising.org> <6A6B56C8-2635-4FDA-82F6-A63BD22238CC@subvertising.org> X-Spam-Score: -2.3 (--) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) > Date: Thu, 02 Jan 2025 14:12:06 +0000 > From: divya--- via "Bug reports for GNU Emacs, > the Swiss army knife of text editors" > > Hello again Stefan and Happy GNU/Year. > > > Hmm... on my tests, I can reproduce in `emacs-30` the very slow > > font-locking you described when we're at the end of the buffer, but not > > on `master`. Just to confirm that you're running the "right" code, can > > you do `M-: font-lock--syntax-table-affects-ppss RET` from within that > > `tex.scm` buffer? It should return nil if my fix was applied. If it > > returns t then you're presumably still using the old code (or there's > > something else amiss). If it returns something else than nil or t then > > there's something else amiss. > > I just checked and my compiled build was of an older commit. The > variable was set `t`. I built from the latest commit and indeed now I > can scroll flawlessly in the reported file. > > > FWIW, even with the fix, Emacs is not quite able to keep up with `M-v` > > with an auto-repeat of 40/s when done from the end of the buffer, but: > > - When I release the key it catches up fairly quickly (hence the "not > > quite"). So I wouldn't describe it as "hangs". > > - This is on my 16 years old 2.5GHz Core 2 Duo (Thinkpad T61). > > - It's an Emacs compiled with `-Og` and with `--enable-checking`. > > That's reasonable for the system. I do not notice any sort of lag with > `M-v` on my system (Ryzen 7 5700G). > > Thank you Eli and Stefan for the prompt fix. Really admire the work you > guys do. So should we now close this bug? From unknown Sun Jun 22 11:42:48 2025 MIME-Version: 1.0 X-Mailer: MIME-tools 5.505 (Entity 5.505) X-Loop: help-debbugs@gnu.org From: help-debbugs@gnu.org (GNU bug Tracking System) To: Divya Ranjan Subject: bug#74281: closed (Re: bug#74281: 30.0.91; font-lock mode hangs on scrolling large Scheme file) Message-ID: References: <8734k0cs1u.fsf@subvertising.org> X-Gnu-PR-Message: they-closed 74281 X-Gnu-PR-Package: emacs Reply-To: 74281@debbugs.gnu.org Date: Sat, 04 Jan 2025 14:55:02 +0000 Content-Type: multipart/mixed; boundary="----------=_1736002502-13935-1" This is a multi-part message in MIME format... ------------=_1736002502-13935-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Your bug report #74281: 30.0.91; font-lock mode hangs on scrolling large Scheme file which was filed against the emacs package, has been closed. The explanation is attached below, along with your original report. If you require more details, please reply to 74281@debbugs.gnu.org. --=20 74281: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D74281 GNU Bug Tracking System Contact help-debbugs@gnu.org with problems ------------=_1736002502-13935-1 Content-Type: message/rfc822 Content-Disposition: inline Content-Transfer-Encoding: 7bit Received: (at 74281-done) by debbugs.gnu.org; 4 Jan 2025 14:54:49 +0000 Received: from localhost ([127.0.0.1]:54099 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tU5Y9-0003c9-3S for submit@debbugs.gnu.org; Sat, 04 Jan 2025 09:54:49 -0500 Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:7808) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from ) id 1tU5Y6-0003bs-GF for 74281-done@debbugs.gnu.org; Sat, 04 Jan 2025 09:54:47 -0500 Received: from pmg1.iro.umontreal.ca (localhost.localdomain [127.0.0.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id 04F3A10004C; Sat, 4 Jan 2025 09:54:40 -0500 (EST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1736002479; bh=5W70ZRO8dmt6+3HHq7Igh1Hc+vcARGkuQkF5NQS7/LU=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=nDKjoLJ3jhf4jBZXq7D87sPvCM/U8+8LTDmYnmXVm7KZc2PcpEmy9vqNRII06krTv bcOs56a7Rf4WVlA0f8goahYcjOOQEsUiVdR+Td/SveVOJoCIlg+JZQMSmLyqh3SmgR QiJ2lXMKAdzJ7dDBz9pYfV6FUJyOtoUfsnSPXZqPe8xlffD0W0KQpfJsJbuAs+9f1Z OSwmF7dLHRfrT+TTTl3z6aj/5IGdo9Ucbwo78uClphZBHtA3YfzCT39Hlf4BaBFjbF SGuVnbGPtTiQU6MRk7/Y6GXxPHy4Gmo0SOZy3kBx7/hwMlXY8s3lSNGULoRCQKPcEe YZNPgiDHqqc5A== Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id 59207100042; Sat, 4 Jan 2025 09:54:39 -0500 (EST) Received: from pastel (104-195-236-84.cpe.teksavvy.com [104.195.236.84]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id EF6A412033B; Sat, 4 Jan 2025 09:54:38 -0500 (EST) From: Stefan Monnier To: Eli Zaretskii Subject: Re: bug#74281: 30.0.91; font-lock mode hangs on scrolling large Scheme file In-Reply-To: <86ttaed8sx.fsf@gnu.org> (Eli Zaretskii's message of "Sat, 04 Jan 2025 15:10:06 +0200") Message-ID: References: <8734k0cs1u.fsf@subvertising.org> <86zfm2jjbo.fsf@gnu.org> <865xo59hhm.fsf@gnu.org> <86a5cfsr6a.fsf@gnu.org> <66CF0D14-5C95-47C8-B96E-FB1DEE0BD065@subvertising.org> <6A6B56C8-2635-4FDA-82F6-A63BD22238CC@subvertising.org> <86ttaed8sx.fsf@gnu.org> Date: Sat, 04 Jan 2025 09:54:30 -0500 User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-SPAM-INFO: Spam detection results: 0 ALL_TRUSTED -1 Passed through trusted hosts only via SMTP AWL -0.340 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% DKIM_SIGNED 0.1 Message has a DKIM or DK signature, not necessarily valid DKIM_VALID -0.1 Message has at least one valid DKIM or DK signature DKIM_VALID_AU -0.1 Message has a valid DKIM or DK signature from author's domain DKIM_VALID_EF -0.1 Message has a valid DKIM or DK signature from envelope-from domain X-SPAM-LEVEL: X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 74281-done Cc: 74281-done@debbugs.gnu.org, divya@subvertising.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) >> I just checked and my compiled build was of an older commit. The >> variable was set `t`. I built from the latest commit and indeed now I >> can scroll flawlessly in the reported file. Excellent, thanks for the confirmation! > So should we now close this bug? Yes, closing, Stefan ------------=_1736002502-13935-1 Content-Type: message/rfc822 Content-Disposition: inline Content-Transfer-Encoding: 7bit Received: (at submit) by debbugs.gnu.org; 9 Nov 2024 16:05:08 +0000 Received: from localhost ([127.0.0.1]:54119 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1t9nxS-0002c3-BR for submit@debbugs.gnu.org; Sat, 09 Nov 2024 11:05:08 -0500 Received: from lists.gnu.org ([209.51.188.17]:60076) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1t9nxO-0002bV-2l for submit@debbugs.gnu.org; Sat, 09 Nov 2024 11:05:04 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1t9nxL-0004Pd-IL for bug-gnu-emacs@gnu.org; Sat, 09 Nov 2024 11:05:00 -0500 Received: from latitanza.investici.org ([82.94.249.234]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1t9nxG-0005Wb-KN for bug-gnu-emacs@gnu.org; Sat, 09 Nov 2024 11:04:59 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=subvertising.org; s=stigmate; t=1731168259; bh=UDndg1HlxbTk2IWkd543QkBbs0qsxbJ4e+AJtvRcVDw=; h=From:To:Subject:Date:From; b=F2hAY6ioq+yUbRwKZZovirsM8SP/pgEQae7yVzU8tdiGJvdk0JJE5xOGJvsw7B641 v23RZZythmB4p5ycdnGU09y/mOVB8CwUmdFiQJR6+8r2hEfd0dqryHlspJKTmkw5Uf fS7NT1pFdVYgvepdVua8ltsgLqiwWintc4k5Z/PM= Received: from mx3.investici.org (unknown [127.0.0.1]) by latitanza.investici.org (Postfix) with ESMTP id 4Xm0xH4VzYzGp4F for ; Sat, 9 Nov 2024 16:04:19 +0000 (UTC) Received: from [82.94.249.234] (mx3.investici.org [82.94.249.234]) (Authenticated sender: divya@subvertising.org) by localhost (Postfix) with ESMTPSA id 4Xm0xG6wGQzGp4R for ; Sat, 9 Nov 2024 16:04:18 +0000 (UTC) From: Divya Ranjan To: bug-gnu-emacs@gnu.org Subject: 30.0.91; font-lock mode hangs on scrolling large Scheme file Date: Sat, 09 Nov 2024 16:04:13 +0000 Message-ID: <8734k0cs1u.fsf@subvertising.org> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=82.94.249.234; envelope-from=divya@subvertising.org; helo=latitanza.investici.org X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Spam-Score: -1.4 (-) X-Debbugs-Envelope-To: submit X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -2.4 (--) 1. 11ikjlkjkkkj 1. In emacs -Q, open a fairly big Scheme file (> 70k) and try to move in the file with C-n, C-f or mouse scrolling. It sverely lags for several seconds, doesn=E2=80=99t even respond to C-g. 2. Toggle font-lock-mode off through M-x, then try to scroll. It works as expected, no serious lags. 3. Running the profiler also shows font-lock as the culprit. This makes working on big projects, in my case the source code of GNU Guix distribution an impossible situation. I haven=E2=80=99t tried setting = up (Guile) Scheme with Tree-Sitter, but shouldn=E2=80=99t simple syntax-highlighting be not a serious problem? To try a big Scheme file and reproduce this, open tex.scm in gnu/packages/tex.scm in Guix source tree: https://git.savannah.gnu.org/cgit/guix.git In GNU Emacs 30.0.91 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.41, cairo version 1.18.0) Windowing system distributor 'The X.Org Foundation', version 11.0.12101012 System Description: Guix System Configured using: 'configure CONFIG_SHELL=3D/gnu/store/3jhfhxdf6v5ms10x5zmnl166dh3yhbr1-bash-minimal-5.= 1.16/bin/bash SHELL=3D/gnu/store/3jhfhxdf6v5ms10x5zmnl166dh3yhbr1-bash-minimal-5.1.16/bi= n/bash --prefix=3D/gnu/store/k3vqb6f4ghi2v50zrzh3657dywfkyfc5-emacs-next-30.0.91-= 1.9a1c76b --enable-fast-install --with-cairo --with-modules --with-native-compilation=3Daot --disable-build-details' Configured features: ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG LCMS2 LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 M17N_FLT MODULES NATIVE_COMP NOTIFY INOTIFY PDUMPER PNG RSVG SECCOMP SOUND SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS TREE_SITTER X11 XDBE XIM XINPUT2 XPM GTK3 ZLIB Important settings: value of $EMACSLOADPATH: /home/divya/.config/guix/current/share/emacs/sit= e-lisp:/home/divya/.guix-home/profile/share/emacs/site-lisp:/home/divya/.gu= ix-profile/share/emacs/site-lisp:/run/current-system/profile/share/emacs/si= te-lisp:/gnu/store/k3vqb6f4ghi2v50zrzh3657dywfkyfc5-emacs-next-30.0.91-1.9a= 1c76b/share/emacs/30.0.91/lisp value of $LANG: en_US.utf8 locale-coding-system: utf-8-unix Major mode: Dired/name 452/587 Minor modes in effect: all-the-icons-dired-mode: t erc-notify-mode: t erc-notifications-mode: t erc-track-mode: t erc-track-minor-mode: t erc-ring-mode: t erc-netsplit-mode: t erc-menu-mode: t erc-match-mode: t erc-list-mode: t erc-irccontrols-mode: t erc-move-to-prompt-mode: t erc-readonly-mode: t erc-imenu-mode: t erc-pcomplete-mode: t erc-button-mode: t erc-fill-mode: t erc-stamp-mode: t erc-autojoin-mode: t erc-networks-mode: t gcmh-mode: t global-corfu-mode: t corfu-mode: t global-paren-face-mode: t global-color-identifiers-mode: t global-hi-lock-mode: t hi-lock-mode: t timeclock-mode-line-display: t server-mode: t dirvish-peek-mode: t dirvish-side-follow-mode: t dirvish-override-dired-mode: t dired-hide-details-mode: t consult-org-roam-mode: t org-roam-db-autosync-mode: t winner-mode: t popper-mode: t meow-global-mode: t meow-mode: t meow-motion-mode: t meow-esc-mode: t display-time-mode: t dimmer-mode: t all-the-icons-completion-mode: t marginalia-mode: t vertico-mode: t global-writeroom-mode: t which-key-mode: t smartparens-global-mode: t doom-modeline-mode: t global-auto-revert-mode: t save-place-mode: t savehist-mode: t recentf-mode: t global-hl-line-mode: t global-display-line-numbers-mode: t override-global-mode: t straight-use-package-mode: t straight-package-neutering-mode: t tooltip-mode: t global-eldoc-mode: t show-paren-mode: t electric-quote-mode: t electric-indent-mode: t mouse-wheel-mode: t global-prettify-symbols-mode: t 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nerd-icons nerd-icons-faces nerd-icons-data nerd-icons-data-mdicon nerd-icons-data-flicon nerd-icons-data-codicon nerd-icons-data-devicon nerd-icons-data-sucicon nerd-icons-data-wicon nerd-icons-data-faicon nerd-icons-data-powerline nerd-icons-data-octicon nerd-icons-data-pomicon nerd-icons-data-ipsicon compat doom-modeline-autoloads shrink-path-autoloads f-autoloads dash-autoloads s-autoloads nerd-icons-autoloads seq-autoloads alert-autoloads finder-inf log4e-autoloads gntp-autoloads rainbow-mode color rainbow-mode-autoloads autorevert filenotify saveplace savehist recentf tree-widget wid-edit hl-line ef-themes ef-themes-autoloads info display-line-numbers edmacro kmacro crux-autoloads use-package-bind-key bind-key easy-mmode all-the-icons-dired-autoloads all-the-icons all-the-icons-faces data-material data-weathericons data-octicons data-fileicons data-faicons data-alltheicons all-the-icons-autoloads use-package-core mu4e-autoloads zenburn-theme-autoloads compat-autoloads jinx-autoloads saveplace-pdf-view-autoloads tablist-autoloads pdf-tools-autoloads guix-emacs use-package-autoloads bind-key-autoloads straight-autoloads cl-extra help-mode straight package browse-url url url-proxy url-privacy url-expand url-methods url-history url-cookie generate-lisp-file url-domsuf url-util mailcap url-handlers url-parse auth-source cl-seq eieio eieio-core cl-macs icons password-cache json map byte-opt gv url-vars cl-loaddefs cl-lib compile text-property-search comint subr-x ansi-osc ansi-color ring bytecomp byte-compile rmc iso-transl tooltip cconv eldoc paren electric uniquify ediff-hook vc-hooks lisp-float-type elisp-mode mwheel term/x-win x-win term/common-win x-dnd touch-screen tool-bar dnd fontset image regexp-opt fringe tabulated-list replace newcomment text-mode lisp-mode prog-mode register page tab-bar menu-bar rfn-eshadow isearch easymenu timer select scroll-bar mouse jit-lock font-lock syntax font-core term/tty-colors frame minibuffer nadvice seq simple cl-generic indonesian philippine cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech european ethiopic indian cyrillic chinese composite emoji-zwj charscript charprop case-table epa-hook jka-cmpr-hook help abbrev obarray oclosure cl-preloaded button loaddefs theme-loaddefs faces cus-face macroexp files window text-properties overlay sha1 md5 base64 format env code-pages mule custom widget keymap hashtable-print-readable backquote threads dbusbind inotify lcms2 dynamic-setting system-font-setting font-render-setting cairo gtk x-toolkit xinput2 x multi-tty move-toolbar make-network-process native-compile emacs) Memory information: ((conses 16 1569808 2032077) (symbols 48 77987 11) (strings 32 393425 106016) (string-bytes 1 17866520) (vectors 16 167276) (vector-slots 8 2824657 579009) (floats 8 2970 25080) (intervals 56 20041 6581) (buffers 992 63)) --=20 Divya Ranjan, Philosophy, Mathematics, Libre Software. ------------=_1736002502-13935-1--