Package: emacs;
Reported by: Eval Exec <execvy <at> gmail.com>
Date: Thu, 27 Feb 2025 13:57:02 UTC
Severity: normal
Found in version 31.0.50
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bug-gnu-emacs <at> gnu.org:bug#76609; Package emacs.
(Thu, 27 Feb 2025 13:57:02 GMT) Full text and rfc822 format available.Eval Exec <execvy <at> gmail.com>:bug-gnu-emacs <at> gnu.org.
(Thu, 27 Feb 2025 13:57:03 GMT) Full text and rfc822 format available.Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):
From: Eval Exec <execvy <at> gmail.com> To: bug-gnu-emacs <at> gnu.org Subject: 31.0.50; The 0.1s repeat timer is very CPU-intensive; it might be a bug? Date: Thu, 27 Feb 2025 21:55:40 +0800
Hello, I a 0.1 s repeat timer in emacs -Q, then Emacs's the cpu usage is 30% ~ 70%. I think it's a bug. You can reproduce it by: (defun exec/emacs-lisp-machine-update() ;; do nothing ) (progn (defvar exec/emacs-lisp-machine-timer nil) (when (timerp exec/emacs-lisp-machine-timer) (cancel-timer exec/emacs-lisp-machine-timer)) (setq exec/emacs-lisp-machine-timer (run-with-timer 0.0 0.1 'exec/emacs-lisp-machine-update)) ) Then you will notice, the Emacs's cpu usage is 30% ~ 70, or you can chang 0.1 to 0.05, 0.01 to feel the high cpu usage. Eval Exec In GNU Emacs 31.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.43, cairo version 1.18.2) of 2025-02-27 built on Mufasa Repository revision: 5815bd52279fdedc752f9f92ace86f8243fbd604 Repository branch: master System Description: NixOS 24.11 (Vicuna) Configured using: 'configure 'CFLAGS=-O3 -march=native' CPPFLAGS=-I/home/exec/soft/mps_artifacts_O3 LDFLAGS=-I/home/exec/soft/mps_artifacts_O3 --prefix=/home/exec/Projects/git.savannah.gnu.org/git/emacs-build/master-5815bd52279fdedc752f9f92ace86f8243fbd604-O3 --with-imagemagick --with-mps=yes --with-modules --with-pgtk --with-cairo --with-cairo-xcb --without-compress-install --with-mailutils --with-tree-sitter --with-xinput2 --with-native-compilation=aot --enable-link-time-optimization --with-file-notification=inotify' Configured features: ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GSETTINGS HARFBUZZ IMAGEMAGICK JPEG LCMS2 LIBOTF LIBXML2 MODULES NATIVE_COMP NOTIFY INOTIFY PDUMPER PGTK PNG RSVG SECCOMP SOUND SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS TREE_SITTER WEBP XIM GTK3 ZLIB Important settings: value of $LC_COLLATE: C value of $LC_MONETARY: en_US.UTF-8 value of $LC_NUMERIC: en_US.UTF-8 value of $LC_TIME: en_US.UTF-8 value of $LANG: en_US.UTF-8 value of $XMODIFIERS: @im=fcitx locale-coding-system: utf-8-unix Major mode: ELisp/l Minor modes in effect: restore-point-mode: t global-atomic-chrome-edit-mode: t marginalia-mode: t rainbow-mode: t elisp-autofmt-mode: t highlight-defined-mode: t elisp-def-mode: t highlight-numbers-mode: t hes-mode: t rainbow-delimiters-mode: t breadcrumb-local-mode: t copilot-mode: t keycast-tab-bar-mode: t vertico-truncate-mode: t vertico-multiform-mode: t vertico-mode: t telega-root-auto-fill-mode: t telega-contact-birthdays-mode: t telega-active-video-chats-mode: t telega-active-locations-mode: t telega-patrons-mode: t telega-active-stories-mode: t tab-line-nerd-icons-global-mode: t global-tab-line-mode: t tab-line-mode: t org-roam-db-autosync-mode: t global-org-modern-mode: t mu4e-modeline-mode: t global-git-commit-mode: t treemacs-git-commit-diff-mode: t treemacs-project-follow-mode: t treemacs-filewatch-mode: t treemacs-follow-mode: t treemacs-git-mode: t treemacs-fringe-indicator-mode: t global-hungry-delete-mode: t hungry-delete-mode: t global-anzu-mode: t anzu-mode: t engine-mode: t symex-mode: t global-evil-surround-mode: t evil-surround-mode: t global-diff-hl-show-hunk-mouse-mode: t diff-hl-show-hunk-mouse-mode: t diff-hl-flydiff-mode: t diff-hl-margin-local-mode: t diff-hl-margin-mode: t global-diff-hl-mode: t diff-hl-mode: t yas-global-mode: t yas-minor-mode: t corfu-terminal-mode: t corfu-popupinfo-mode: t global-corfu-mode: t corfu-mode: t burly-tabs-mode: t global-form-feed-st-mode: t form-feed-st-mode: t eat-eshell-mode: t sly-symbol-completion-mode: t super-save-mode: t savehist-mode: t which-key-mode: t super-hint-xref-mode: t super-hint-rg-mode: t windmove-mode: t server-mode: t save-place-mode: t recentf-mode: t winner-mode: t persistent-scratch-autosave-mode: t global-dash-fontify-mode: t dash-fontify-mode: t nerd-icons-completion-mode: t sudo-edit-indicator-mode: t global-evil-visualstar-mode: t evil-visualstar-mode: t evil-commentary-mode: t global-evil-mc-mode: t evil-mc-mode: t evil-lion-mode: t global-evil-collection-unimpaired-mode: t evil-collection-unimpaired-mode: t buffer-face-mode: t TeX-PDF-mode: t display-line-numbers-mode: t electric-pair-mode: t el-patch-use-package-mode: t global-auto-revert-mode: t evil-mode: t evil-local-mode: t general-override-mode: t minions-mode: t elpaca-use-package-mode: t override-global-mode: t tooltip-mode: t global-eldoc-mode: t eldoc-mode: t show-paren-mode: t electric-indent-mode: t mouse-wheel-mode: t tab-bar-mode: t file-name-shadow-mode: t context-menu-mode: t global-font-lock-mode: t font-lock-mode: t blink-cursor-mode: t minibuffer-regexp-mode: t column-number-mode: -1 line-number-mode: -1 transient-mark-mode: t auto-composition-mode: t auto-encryption-mode: t auto-compression-mode: t hs-minor-mode: t Load-path shadows: /home/exec/.emacs.d/elpaca/builds/lispy/elpa hides /home/exec/.emacs.d/elpaca/builds/ivy/elpa /home/exec/.emacs.d/elpaca/builds/modus-themes/theme-loaddefs hides /home/exec/.emacs.d/elpaca/builds/standard-themes/theme-loaddefs /home/exec/.emacs.d/elpaca/builds/modus-themes/theme-loaddefs hides /home/exec/.emacs.d/elpaca/builds/ef-themes/theme-loaddefs /home/exec/.emacs.d/elpaca/builds/modus-themes/theme-loaddefs hides /home/exec/Projects/git.savannah.gnu.org/git/emacs-build/master-5815bd52279fdedc752f9f92ace86f8243fbd604-O3/share/emacs/31.0.50/lisp/theme-loaddefs /home/exec/.emacs.d/elpaca/builds/transient/transient hides /home/exec/Projects/git.savannah.gnu.org/git/emacs-build/master-5815bd52279fdedc752f9f92ace86f8243fbd604-O3/share/emacs/31.0.50/lisp/transient Features: (shadow sort mail-extr evil-collection-shortdoc shortdoc info-colors cus-start tabify descr-text evil-collection-woman woman gptel-context gptel-transient gptel-curl toml-ts-mode evil-collection-timer-list timer-list expand-region yaml-mode-expansions subword-mode-expansions text-mode-expansions cc-mode-expansions the-org-mode-expansions python-el-fgallina-expansions latex-mode-expansions js2-mode-expansions js-mode-expansions web-mode-expansions html-mode-expansions clojure-mode-expansions er-basic-expansions expand-region-core expand-region-custom dabbrev cape lsp-diagnostics lsp-modeline lsp-icons nerd-icons-dired diredfl lsp-zig lsp-yang lsp-yaml lsp-xml lsp-wgsl lsp-volar lsp-vimscript lsp-vhdl lsp-vetur lsp-html lsp-verilog lsp-vala lsp-v lsp-typespec lsp-typeprof lsp-ttcn3 lsp-ts-query lsp-trunk lsp-toml lsp-tilt lsp-tex lsp-terraform lsp-svelte lsp-steep lsp-sqls lsp-sql lsp-sorbet lsp-solidity lsp-solargraph lsp-semgrep lsp-ruff lsp-ruby-syntax-tree lsp-ruby-lsp lsp-rubocop lsp-roslyn lsp-roc lsp-rf lsp-remark lsp-racket lsp-r lsp-qml lsp-pyright lsp-pylsp lsp-pyls lsp-pwsh lsp-purescript lsp-pls lsp-php lsp-perlnavigator lsp-perl lsp-openscad lsp-ocaml lsp-nushell lsp-nix lsp-nim lsp-nginx lsp-nextflow lsp-move lsp-mojo lsp-mint lsp-meson lsp-mdx lsp-matlab lsp-marksman lsp-markdown lsp-magik lsp-fennel lsp-lua lsp-lisp lsp-kubernetes-helm lsp-kotlin lsp-json lsp-jq lsp-javascript lsp-idris lsp-haxe lsp-hack lsp-groovy lsp-graphql lsp-golangci-lint lsp-glsl lsp-gleam lsp-gdscript lsp-fsharp lsp-futhark lsp-fortran lsp-eslint lsp-erlang lsp-emmet lsp-elm lsp-elixir lsp-earthly lsp-dockerfile lsp-dhall lsp-d lsp-cypher lsp-cucumber lsp-copilot lsp-css lsp-c3 lsp-csharp lsp-crystal lsp-credo lsp-cobol lsp-cmake lsp-clojure lsp-clangd lsp-bufls lsp-go lsp-completion lsp-beancount lsp-bash lsp-awk lsp-autotools lsp-astro lsp-asm lsp-ansible lsp-angular lsp-ada lsp-actionscript vertico-grid symbol-overlay eee org-indent org-download image-file image-converter oc-basic ol-eww ol-rmail ol-mhe ol-irc ol-info ol-gnus nnselect ol-docview evil-collection-doc-view doc-view jka-compr ol-bibtex bibtex ol-bbdb ol-w3m ol-doi org-link-doi gptel-org gptel-gemini gptel-ollama gptel-openai consult-dir-autoloads consult-ag-autoloads restore-point evil-collection-atomic-chrome atomic-chrome marginalia rainbow-mode elisp-autofmt highlight-defined elisp-def evil-collection-ert ert highlight-numbers parent-mode highlight-escape-sequences rainbow-delimiters breadcrumb copilot copilot-balancer editorconfig editorconfig-core editorconfig-core-handle editorconfig-fnmatch jsonrpc keycast zig-mode reformatter empv vertico-truncate vertico-posframe vertico-multiform evil-collection-vertico vertico lsp-uniteai nix-ts-mode go-translate gt-text-utility gt-engine-echo gt-engine-libre gt-engine-chatgpt gt-engine-youdao gt-engine-stardict gt-engine-deepl gt-engine-google-rpc gt-engine-google gt-engine-bing gt-extension gt-faces gt-core gt-httpx sdcv cap-words superword subword evil-collection-telega telega-obsolete telega telega-tdlib-events telega-match telega-root telega-info telega-chat telega-modes telega-company telega-emoji telega-user telega-notifications telega-voip telega-msg telega-story telega-webpage telega-tme telega-sticker telega-vvnote telega-ffplay telega-i18n telega-sort telega-filter telega-ins telega-inline telega-util telega-folders telega-topic telega-media telega-tdlib telega-server telega-core telega-customize emacsbug tab-line-nerd-icons evil-collection-imenu-list imenu-list hide-comnt hideshow tab-line rust-utils rust-mode-treesitter rust-ts-mode rust-mode rust-playpen rust-cargo rust-common rust-rustfmt rust-compile cargo cargo-process toml rg-info-hack rg-menu rg-ibuffer rg-result wgrep-rg rg-history ibuf-ext evil-collection-ibuffer ibuffer ibuffer-loaddefs rg-header evil-collection-ultra-scroll ultra-scroll pixel-scroll cua-base org-sliced-images evil-collection-org-roam org-roam-migrate org-roam-log org-roam-mode org-roam-capture org-roam-id org-roam-node org-roam-db emacsql-sqlite-builtin sqlite org-roam-utils org-roam-compat org-roam org-capture org-journal org-crypt cal-iso org-modern orderless evil-collection-mu4e mu4e mu4e-org mu4e-notification mu4e-main smtpmail mu4e-view mu4e-mime-parts mu4e-headers mu4e-thread mu4e-actions mu4e-compose mu4e-draft gnus-msg gnus-art mm-uu mml2015 gnus-sum gnus-group gnus-undo gnus-start gnus-dbus gnus-cloud nnimap nnmail mail-source utf7 nnoo gnus-spec gnus-int gnus-range gnus-win mu4e-search mu4e-lists mu4e-bookmarks mu4e-mark mu4e-message flow-fill mu4e-contacts mu4e-update mu4e-folders mu4e-context mu4e-query-items mu4e-server mu4e-modeline mu4e-vars mu4e-helpers mu4e-config mu4e-window ido mu4e-obsolete cyphejor rfc-mode string-inflection systemd minuet pr-review pr-review-render pr-review-action pr-review-input pr-review-api pr-review-common evil-collection-forge forge-repos forge-tablist forge-topics forge-commands forge-semi forge-bitbucket buck forge-gogs gogs forge-gitea gtea forge-gitlab glab forge-github ghub-graphql treepy gsexp ghub forge-forgejo forge-notify forge-revnote forge-pullreq forge-issue forge-topic eieio-custom bug-reference forge-post forge-repo forge forge-core forge-db closql emacsql-sqlite emacsql emacsql-compiler eieio-base treemacs-magit magit-bookmark evil-collection-magit magit-submodule magit-blame magit-stash magit-reflog magit-bisect magit-push magit-pull magit-fetch magit-clone magit-remote magit-commit magit-sequence magit-notes magit-worktree magit-tag magit-merge magit-branch magit-reset magit-files magit-refs magit-status magit evil-collection-magit-repos magit-repos magit-apply magit-wip magit-log which-func magit-diff git-commit magit-core magit-autorevert magit-margin magit-transient magit-process evil-collection-with-editor with-editor magit-mode magit-git magit-base dap-java dap-mode dap-tasks dap-launch lsp-docker yaml dap-overlays lsp-java treemacs-nerd-icons lsp-treemacs lsp-treemacs-generic lsp-treemacs-themes treemacs-treelib treemacs-git-commit-diff-mode treemacs-project-follow-mode treemacs-mouse-interface zoom treemacs treemacs-header-line treemacs-compatibility treemacs-mode treemacs-bookmarks treemacs-tags treemacs-interface treemacs-persistence treemacs-filewatch-mode treemacs-follow-mode treemacs-rendering treemacs-annotations treemacs-async treemacs-workspaces treemacs-dom treemacs-visuals treemacs-fringe-indicator treemacs-faces treemacs-icons treemacs-scope treemacs-themes treemacs-core-utils pfuture treemacs-logging treemacs-customization treemacs-macros consult-lsp lsp-ui lsp-ui-flycheck lsp-ui-doc evil-collection-lsp-ui-imenu lsp-ui-imenu lsp-ui-peek lsp-ui-sideline lsp-rust lsp-semantic-tokens lsp-mode network-stream evil-collection-markdown-mode markdown-mode lsp-ui-util lsp-protocol llm-prompt groovy-mode iedit iedit-lib evil-collection-hungry-delete hungry-delete minibuffer-header gptel-quick gotest fzf flycheck-clj-kondo pos-tip consult-flycheck evil-collection-flycheck flycheck evil-anzu anzu engine-mode evil-collection-ement ement-room-list taxy-magit-section taxy ement ement-notifications ement-notify ement-room ement-lib ement-api ement-structs ement-macros dns llm-ollama llm-provider-utils llm-models llm-request-plz plz-event-source plz-media-type plz llm symex symex-evil symex-evil-support symex-hydra symex-transformations symex-transformations-lisp symex-utils evil-cleverparens evil-cleverparens-text-objects evil-cleverparens-util smartparens loadhist evil-surround symex-misc symex-interface-builtins symex-interface-fennel symex-interface-arc symex-interface-common-lisp symex-interface-clojure symex-interface-scheme symex-interface-racket symex-interface-elisp symex-interop symex-interface symex-traversals symex-dsl symex-evaluator symex-computations symex-primitives symex-ts symex-utils-ts symex-transformations-ts symex-primitives-lisp symex-data symex-ui symex-custom evil-collection-lispy lispy le-clojure delsel lispy-inline avy lispy-tags zoutline combobulate evil-collection-elfeed elfeed-show elfeed-search elfeed-csv elfeed elfeed-curl elfeed-log elfeed-db elfeed-lib xml-query dired-git-info dired-hacks dired-preview diff-hl-show-hunk diff-hl-inline-popup diff-hl-flydiff diff-hl-margin diff-hl-dired evil-collection-diff-hl diff-hl evil-collection-log-view log-view evil-collection-log-edit log-edit add-log pcvs-util evil-collection-vc-dir vc-dir ewoc evil-collection-cmake-mode cmake-mode consult-yasnippet yasnippet-capf yasnippet-snippets yasnippet kind-icon svg-lib corfu-terminal popon corfu-popupinfo corfu-indexed evil-collection-corfu corfu paredit clojure-ts-mode evil-collection-cider cider tramp-sh cider-debug cider-browse-ns cider-mode cider-xref-backend cider-find cider-inspector cider-completion cider-profile cider-eval cider-jar cider-repl-history pulse cider-repl cider-resolve cider-test cider-overlays cider-stacktrace cider-doc cider-browse-spec cider-clojuredocs cider-eldoc cider-docstring cider-client cider-common cider-completion-context cider-connection cider-popup sesman-browser nrepl-client cider-util sesman queue nrepl-dict spinner clojure-mode chatgpt-shell chatgpt-shell-openrouter chatgpt-shell-perplexity chatgpt-shell-openai chatgpt-shell-ollama chatgpt-shell-kagi chatgpt-shell-google chatgpt-shell-anthropic chatgpt-shell-prompt-compose evil-collection-smerge-mode smerge-mode diff shell-maker ielm evil-collection-eshell eshell em-prompt esh-mode esh-var esh-cmd esh-ext esh-proc esh-opt esh-io esh-arg esh-module esh-module-loaddefs esh-util bookmark-in-project bookmark+ bookmark+-key bookmark+-1 bookmark+-bmu bookmark+-lit babashka parseedn parseclj-parser parseclj-lex parseclj-alist cnfonts burly-tabs burly frameset compile-multi form-feed-st google-this echo-bar fcitx evil-collection-eat eat term/xterm xterm evil-collection-term term ehelp ox-reveal ox-odt rng-loc rng-uri rng-parse rng-match rng-dt rng-util rng-pttrn nxml-parse nxml-ns nxml-enc xmltok nxml-util ox-latex ox-icalendar org-agenda ox-html table ox-ascii ox-publish ox org-attach org-element org-persist org-id org-refile org-element-ast inline avl-tree htmlize evil-collection-explain-pause-mode explain-pause-mode explain-pause-top explain-pause-log-to-socket evil-collection-profiler profiler weather-metno solar cal-dst url-cache display-wttr kdeconnect crux pest-mode popwin modus-themes blackboard-theme standard-themes nimbus-theme tok-theme danneskjold-theme srcery-theme subatomic256-theme iscroll xml+ evil-textobj-tree-sitter evil-textobj-tree-sitter-thing-at-point evil-textobj-tree-sitter-core tree-sitter tree-sitter-load tree-sitter-cli tsc tsc-dyn tsc-dyn-get dired-aux tsc-obsolete ctable line-reminder ov ht fringe-helper solarized-theme solarized solarized-faces sqlup-mode evil-collection-bm bm zen-mode evil-collection-sly sly sly-completion sly-buttons sly-messages sly-common evil-collection-apropos apropos evil-collection-arc-mode arc-mode archive-mode hyperspec sicp base16-theme idea-darkula-theme hybrid-reverse-theme material-theme doom-themes doom-themes-base nyan-mode organic-green-theme inkpot-theme github-dark-vscode-theme almost-mono-themes cyberpunk-theme soothe-theme soothe-tva zenburn-theme mindre-theme kaolin-themes kaolin-themes-lib tron-legacy-theme wildcharm-theme atom-one-dark-theme parchment-theme autothemer visual-fill-column transpose-frame gameoflife evil-collection-docker docker docker-context docker-volume docker-network docker-image docker-container docker-faces docker-core docker-compose docker-process docker-utils docker-group dockerfile-mode emacs-everywhere cus-dir dumb-jump evil-collection-popup popup websocket bindat bing-dict bing-dict-cache hl-todo atom-dark-theme ef-themes uwu-theme vagrant evil-collection-ag ag vc-svn find-dired alarm-clock alert notifications gntp pinentry evil-collection-hackernews hackernews evil-collection-notmuch notmuch notmuch-tree notmuch-jump notmuch-hello notmuch-show notmuch-print notmuch-crypto notmuch-mua notmuch-message notmuch-draft notmuch-maildir-fcc notmuch-address notmuch-company notmuch-parser notmuch-wash coolj goto-addr icalendar diary-lib diary-loaddefs notmuch-tag notmuch-lib notmuch-compat message sendmail yank-media rfc822 mml mailabbrev gmm-utils mm-view mml-smime mml-sec smime gnutls dig mm-decode mm-bodies mm-encode fussy flx affe evil-collection-consult consult clang-format apheleia apheleia-rcs apheleia-dp apheleia-formatters apheleia-utils apheleia-log apheleia-formatter-context vimrc-mode gnuplot olivetti super-save evil-collection-helpful helpful cc-langs trace cl-print evil-collection-edebug edebug evil-collection-debug debug backtrace info-look evil-collection-info info help-fns radix-tree evil-collection-elisp-refs elisp-refs solidity-mode solidity-common evil-collection-git-timemachine git-timemachine web-mode disp-table evil-collection-go-mode go-mode find-file evil-collection-js2-mode js2-mode etags fileloop zig-mode-autoloads reformatter-autoloads empv-autoloads yasnippet-snippets-autoloads marginalia-autoloads vertico-truncate-autoloads vertico-posframe-autoloads vertico-autoloads lsp-uniteai-autoloads nix-ts-mode-autoloads go-translate-autoloads alert-autoloads gntp-autoloads sdcv-autoloads telega-autoloads tab-line-nerd-icons-autoloads keycast-autoloads rust-mode-autoloads cargo-autoloads toml-autoloads rg-autoloads writeroom-mode-autoloads nov-autoloads esxml-autoloads kv-autoloads ultra-scroll-autoloads pdf-tools-autoloads org-sliced-images-autoloads consult-org-roam-autoloads org-roam-autoloads org-journal-autoloads org-download-autoloads org-modern-autoloads orderless-autoloads mu4e-autoloads cyphejor-autoloads rfc-mode-autoloads string-inflection-autoloads webpaste-autoloads systemd-autoloads minuet-autoloads pr-review-autoloads forge-autoloads closql-autoloads emacsql-autoloads ghub-autoloads treepy-autoloads lsp-java-autoloads dap-mode-autoloads bui-autoloads lsp-treemacs-autoloads lsp-docker-autoloads yaml-autoloads lsp-pyright-autoloads consult-lsp-autoloads lsp-ui-autoloads lsp-mode-autoloads groovy-mode-autoloads imenu-list-autoloads hungry-delete-autoloads hide-comnt-autoloads minibuffer-header-autoloads gptel-quick-autoloads gptel-autoloads gotest-autoloads fzf-autoloads flycheck-golangci-lint-autoloads flycheck-clj-kondo-autoloads pos-tip-autoloads consult-flycheck-autoloads flycheck-rust-autoloads flycheck-posframe-autoloads flycheck-autoloads evil-anzu-autoloads anzu-autoloads engine-mode-autoloads ement-autoloads taxy-magit-section-autoloads taxy-autoloads embark-consult-autoloads embark-autoloads ellama-autoloads llm-autoloads plz-event-source-autoloads plz-media-type-autoloads plz-autoloads symex-autoloads tree-sitter-autoloads tsc-autoloads lispy-autoloads iedit-autoloads swiper-autoloads ivy-autoloads zoutline-autoloads evil-cleverparens-autoloads smartparens-autoloads combobulate-autoloads combobulate-go combobulate-json combobulate-yaml combobulate-css combobulate-js-ts combobulate-python combobulate-html combobulate-toml combobulate-cursor multiple-cursors mc-separate-operations rectangular-region-mode mc-mark-pop mc-edit-lines mc-hide-unmatched-lines-mode mc-mark-more sgml-mode mc-cycle-cursors multiple-cursors-core combobulate-query savehist evil-collection-scheme scheme combobulate-ui combobulate-display combobulate-ztree combobulate-envelope combobulate-manipulation evil-collection-python python combobulate-procedure combobulate-navigation combobulate-misc combobulate-setup tempo combobulate-interface combobulate-settings combobulate-rules elisp-def-autoloads elfeed-tube-mpv-autoloads elfeed-tube-autoloads elfeed-autoloads eee-autoloads dired-git-info-autoloads dired-hacks-autoloads dired-preview-autoloads diredfl-autoloads diff-hl-autoloads cmake-mode-autoloads consult-yasnippet-autoloads yasnippet-capf-autoloads yasnippet-autoloads cape-autoloads kind-icon-autoloads svg-lib-autoloads corfu-terminal-autoloads popon-autoloads corfu-autoloads copilot-autoloads copilot-chat-autoloads paredit-autoloads clojure-ts-mode-autoloads cider-autoloads clojure-mode-autoloads queue-autoloads spinner-autoloads sesman-autoloads chatgpt-shell-autoloads shell-maker-autoloads breadcrumb-autoloads bookmark-in-project-autoloads bookmark+-autoloads babashka-autoloads parseedn-autoloads parseclj-autoloads aider-autoloads mediawiki-autoloads markdown-mode-autoloads treemacs-magit-autoloads magit-autoloads with-editor-autoloads nerd-icons-ibuffer-autoloads treemacs-nerd-icons-autoloads treemacs-autoloads pfuture-autoloads cfrs-autoloads cnfonts-autoloads burly-autoloads compile-multi-autoloads form-feed-st-autoloads google-this-autoloads echo-bar-autoloads zoom-autoloads fcitx-autoloads eat-autoloads vterm-autoloads chatgpt-autoloads polymode-autoloads ox-reveal-autoloads htmlize-autoloads wordreference-autoloads explain-pause-mode-autoloads weather-metno-autoloads display-wttr-autoloads kdeconnect-autoloads emms-autoloads crux-autoloads pest-mode-autoloads popwin-autoloads modus-themes-autoloads blackboard-theme-autoloads standard-themes-autoloads nimbus-theme-autoloads tok-theme-autoloads danneskjold-theme-autoloads srcery-theme-autoloads subatomic256-theme-autoloads iscroll-autoloads xml+-autoloads multiple-cursors-autoloads evil-textobj-tree-sitter-autoloads evil-numbers-autoloads ctable-autoloads line-reminder-autoloads fringe-helper-autoloads ov-autoloads solarized-theme-autoloads sqlup-mode-autoloads bm-autoloads zen-mode-autoloads sly-autoloads expand-region-autoloads highlight-defined-autoloads base16-theme-autoloads idea-darkula-theme-autoloads hybrid-reverse-theme-autoloads material-theme-autoloads doom-themes-autoloads nyan-mode-autoloads organic-green-theme-autoloads inkpot-theme-autoloads github-dark-vscode-theme-autoloads almost-mono-themes-autoloads cyberpunk-theme-autoloads soothe-theme-autoloads zenburn-theme-autoloads mindre-theme-autoloads kaolin-themes-autoloads tron-legacy-theme-autoloads wildcharm-theme-autoloads atom-one-dark-theme-autoloads parchment-theme-autoloads autothemer-autoloads visual-fill-column-autoloads transpose-frame-autoloads gameoflife-autoloads docker-autoloads dockerfile-mode-autoloads emacs-everywhere-autoloads cus-dir-autoloads makefile-executor-autoloads dumb-jump-autoloads popup-autoloads bing-dict-autoloads hl-todo-autoloads atom-dark-theme-autoloads ef-themes-autoloads uwu-theme-autoloads vagrant-autoloads ag-autoloads alarm-clock-autoloads pinentry-autoloads hackernews-autoloads notmuch-autoloads fussy-autoloads flx-autoloads affe-autoloads consult-autoloads clang-format-autoloads apheleia-autoloads elisp-autofmt-autoloads vimrc-mode-autoloads mpv-autoloads gnuplot-autoloads mermaid-mode-autoloads atomic-chrome-autoloads websocket-autoloads restore-point-autoloads ace-window-autoloads avy-autoloads olivetti-autoloads super-save-autoloads helpful-autoloads elisp-refs-autoloads solidity-mode-autoloads git-timemachine-autoloads web-mode-autoloads adoc-mode-autoloads go-mode-autoloads js2-mode-autoloads rust-playground-autoloads evil-collection-which-key which-key super-hint-xref super-hint-rg super-hint evil-collection-xref xref evil-collection-rg rg piper ob-shell ob-gnuplot ob-C evil-collection-org org ob ob-tangle ob-ref ob-lob ob-table ob-exp org-macro org-src evil-collection-sh-script sh-script executable ob-comint org-pcomplete org-list org-footnote org-faces org-entities org-version ob-emacs-lisp ob-core ob-eval org-cycle org-table ol org-fold org-fold-core org-keys oc org-loaddefs org-compat org-macs molecule-mode lsp hyperbole gptel-manual-complete evil-collection-gptel gptel windmove erc erc-backend erc-networks erc-common erc-compat erc-loaddefs evil-collection-ediff ediff ediff-merg ediff-mult ediff-wind ediff-diff ediff-help ediff-init ediff-util dired-x consult-ripgrep-all server evil-collection-eww eww vtable mule-util url-queue epa-file evil-collection-epa epa epg rfc6068 epg-config saveplace recentf tree-widget winner edit-list refine loop list-utils evil-collection-leetcode leetcode derived log4e aio mm-url evil-collection-gnus gnus nnheader gnus-util range let-alist prompts file-info browse-at-remote f image-roll evil-collection-image image-mode exif toc-mode rst scratch sql evil-collection-view view persistent-scratch exercism persist async-await iter2 generator promise url-http url-auth mail-parse rfc2231 rfc2047 rfc2045 mm-util ietf-drums mail-prsvr url-gw nsm promise-rejection-tracking promise-finally promise-done promise-es6-extensions promise-core async request mailheader mail-utils a indent-bars evil-collection-outline noutline outline mode-line-bell powerthesaurus jeison dash s evil-collection-ripgrep ripgrep evil-collection-wgrep wgrep evil-collection-grep grep evil-collection-vlf vlf vlf-base vlf-tune gptai ctrlf hl-line nerd-icons-completion 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 disable-mouse mingus libmpdee evil-collection-mpdel mpdel mpdel-browser libmpdel-directory mpdel-playlist mpdel-tablist mpdel-song mpdel-core navigel evil-collection-bookmark bookmark evil-collection-tablist tablist tablist-filter semantic/wisent/comp semantic/wisent semantic/wisent/wisent semantic/util-modes semantic/util semantic semantic/tag semantic/lex semantic/fw mode-local find-func cedet libmpdel tq time-stamp posframe esup esup-child benchmark ssh-config-mode jq-mode json-mode json-snatcher js c-ts-common treesit evil-collection-imenu imenu cc-mode cc-fonts cc-guess cc-menus cc-cmds cc-styles cc-align cc-engine cc-vars cc-defs evil-collection-yaml-mode yaml-mode toml-mode conf-mode align highlight facemenu nix-mode ffap smie nix-repl nix-shell nix-store evil-collection-magit-section magit-section cursor-sensor llama nix-log nix-instantiate nix-shebang nix-format nix sudo-edit tramp trampver tramp-integration tramp-message tramp-compat shell pcomplete parse-time iso8601 time-date tramp-loaddefs evil-collection-devdocs devdocs mathjax evil-terminal-cursor-changer evil-visualstar evil-commentary evil-commentary-integration evil-collection-evil-mc evil-mc evil-mc-command-execute evil-mc-command-record evil-mc-cursor-make evil-mc-region evil-mc-cursor-state evil-mc-undo evil-mc-vars evil-mc-known-commands evil-mc-common evil-exchange evil-lion evil-args smartscan timeout ess ess-utils ess-custom evil-collection-unimpaired evil-collection-vc-git evil-collection-tabulated-list evil-collection-tab-bar evil-collection-simple evil-collection-replace evil-collection-process-menu evil-collection-package-menu evil-collection-minibuffer evil-collection-man evil-collection-kmacro evil-collection-indent evil-collection-help evil-collection-flymake evil-collection-elisp-mode evil-collection-eldoc evil-collection-elpaca evil-collection-dired evil-collection-diff-mode evil-collection-custom evil-collection-compile evil-collection-comint evil-collection-calendar evil-collection-buff-menu evil-collection annalist sqlite3 sqlite3-api treebundel vc-git diff-mode track-changes files-x git-link dired dired-loaddefs texfrag face-remap shr pixel-fill kinsoku url-file puny svg dom preview latex latex-flymake flymake project compile text-property-search comint ansi-osc tex-ispell tex-style tex dbus xml crm texmathp auctex display-line-numbers elec-pair lisp-mnt package browse-url xdg url-handlers xterm-color edit-list-autoloads refine-autoloads list-utils-autoloads loop-autoloads leetcode-autoloads aio-autoloads log4e-autoloads prompts-autoloads file-info-autoloads hydra-autoloads lv-autoloads browse-at-remote-autoloads image-roll-autoloads saveplace-pdf-view-autoloads pdfgrep-autoloads toc-mode-autoloads scratch-autoloads persistent-scratch-autoloads exercism-autoloads a-autoloads request-autoloads async-autoloads async-await-autoloads promise-autoloads iter2-autoloads persist-autoloads indent-bars-autoloads rainbow-delimiters-autoloads rainbow-mode-autoloads mode-line-bell-autoloads powerthesaurus-autoloads hydra lv jeison-autoloads ripgrep-autoloads wgrep-autoloads vlf-autoloads gptai-autoloads popper-autoloads ctrlf-autoloads nerd-icons-dired-autoloads nerd-icons-completion-autoloads nerd-icons-autoloads disable-mouse-autoloads mingus-autoloads libmpdee-autoloads mpdel-autoloads libmpdel-autoloads navigel-autoloads tablist-autoloads posframe-autoloads esup-autoloads quickrun-autoloads ht-autoloads ssh-config-mode-autoloads jq-mode-autoloads json-mode-autoloads json-snatcher-autoloads yaml-mode-autoloads toml-mode-autoloads symbol-overlay-autoloads highlight-escape-sequences-autoloads highlight-autoloads highlight-numbers-autoloads parent-mode-autoloads nix-mode-autoloads magit-section-autoloads llama-autoloads sudo-edit-autoloads attrap-autoloads f-autoloads dash-autoloads s-autoloads devdocs-autoloads mathjax-autoloads evil-terminal-cursor-changer-autoloads evil-surround-autoloads evil-visualstar-autoloads evil-commentary-autoloads evil-mc-autoloads evil-exchange-autoloads evil-lion-autoloads evil-args-autoloads smartscan-autoloads timeout-autoloads ess-autoloads info-colors-autoloads el-patch-autoloads el-patch el-patch-stub evil-collection-autoloads annalist-autoloads sqlite3-autoloads treebundel-autoloads git-link-autoloads texfrag-autoloads auctex-autoloads tex-site xterm-color-autoloads ispell man ansi-color autorevert filenotify cal-menu calendar cal-loaddefs advice evil evil-integration evil-maps evil-commands reveal evil-jumps evil-command-window evil-types evil-search evil-ex evil-macros evil-repeat evil-states evil-core comp comp-cstr comp-run comp-common rx evil-common thingatpt rect evil-vars ring undo-fu goto-chg evil-autoloads undo-fu-autoloads goto-chg-autoloads transient pcase format-spec transient-autoloads general memoize sanityinc-tomorrow-bright-theme color-theme-sanityinc-tomorrow color minions compat general-autoloads memoize-autoloads color-theme-sanityinc-tomorrow-autoloads minions-autoloads edmacro kmacro vc vc-dispatcher cl-extra help-mode elpaca-use-package use-package use-package-ensure use-package-delight use-package-diminish use-package-bind-key bind-key easy-mmode use-package-core elpaca-use-package-autoloads elpaca-log elpaca-ui elpaca-menu-elpa elpaca-menu-melpa url url-proxy url-privacy url-expand url-methods url-history url-cookie generate-lisp-file url-domsuf url-util url-parse auth-source cl-seq eieio eieio-core cl-macs password-cache json subr-x map byte-opt gv bytecomp byte-compile url-vars mailcap elpaca-menu-org elpaca warnings elpaca-process elpaca-autoloads early-init cus-edit pp cus-load icons wid-edit cl-loaddefs cl-lib rmc iso-transl tooltip cconv eldoc paren electric uniquify ediff-hook vc-hooks lisp-float-type elisp-mode mwheel term/pgtk-win pgtk-win term/common-win touch-screen pgtk-dnd 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 dynamic-setting system-font-setting font-render-setting cairo gtk pgtk lcms2 multi-tty move-toolbar make-network-process tty-child-frames native-compile emacs) Memory information: ((conses 16 3621582 18472292) (symbols 48 157613 5456) (strings 32 893710 403795) (string-bytes 1 27370804) (vectors 16 260241) (vector-slots 8 3936524 5289091) (floats 8 4305 26791) (intervals 56 73808 42187) (buffers 992 149)) --
bug-gnu-emacs <at> gnu.org:bug#76609; Package emacs.
(Thu, 27 Feb 2025 14:29:02 GMT) Full text and rfc822 format available.Message #8 received at 76609 <at> debbugs.gnu.org (full text, mbox):
From: Eli Zaretskii <eliz <at> gnu.org> To: Eval Exec <execvy <at> gmail.com> Cc: 76609 <at> debbugs.gnu.org Subject: Re: bug#76609: 31.0.50; The 0.1s repeat timer is very CPU-intensive; it might be a bug? Date: Thu, 27 Feb 2025 16:27:44 +0200
> From: Eval Exec <execvy <at> gmail.com> > Date: Thu, 27 Feb 2025 21:55:40 +0800 > > I a 0.1 s repeat timer in emacs -Q, then Emacs's the cpu usage is 30% ~ > 70%. > I think it's a bug. I get around 45% with this, but why do you consider this a bug? Your timer function perhaps does nothing, but the timer machinery is invoked every 100 msec, and it does consume CPU. in addition, when you have a high-frequency timer, the Emacs idle loop is much more expensive, because instead of waiting inside pselect, it runs all the loop code every 100 msec. Maybe I'm missing something, but I don't see a bug here.
bug-gnu-emacs <at> gnu.org:bug#76609; Package emacs.
(Thu, 27 Feb 2025 14:40:13 GMT) Full text and rfc822 format available.Message #11 received at 76609 <at> debbugs.gnu.org (full text, mbox):
From: Eval Exec <execvy <at> gmail.com> To: Eli Zaretskii <eliz <at> gnu.org> Cc: 76609 <at> debbugs.gnu.org Subject: Re: bug#76609: 31.0.50; The 0.1s repeat timer is very CPU-intensive; it might be a bug? Date: Thu, 27 Feb 2025 22:34:44 +0800
45% CPU for a 0.1s repeating timer does seem surprisingly high. Is there a way we can optimize this, given the frequent timer invocations? On Thu, Feb 27, 2025 at 10:27 PM Eli Zaretskii <eliz <at> gnu.org> wrote: > > > From: Eval Exec <execvy <at> gmail.com> > > Date: Thu, 27 Feb 2025 21:55:40 +0800 > > > > I a 0.1 s repeat timer in emacs -Q, then Emacs's the cpu usage is 30% ~ > > 70%. > > I think it's a bug. > > I get around 45% with this, but why do you consider this a bug? Your > timer function perhaps does nothing, but the timer machinery is > invoked every 100 msec, and it does consume CPU. > > in addition, when you have a high-frequency timer, the Emacs idle loop > is much more expensive, because instead of waiting inside pselect, it > runs all the loop code every 100 msec. > > Maybe I'm missing something, but I don't see a bug here.
bug-gnu-emacs <at> gnu.org:bug#76609; Package emacs.
(Thu, 27 Feb 2025 14:40:16 GMT) Full text and rfc822 format available.Message #14 received at 76609 <at> debbugs.gnu.org (full text, mbox):
From: Eval Exec <execvy <at> gmail.com> To: Eli Zaretskii <eliz <at> gnu.org> Cc: 76609 <at> debbugs.gnu.org Subject: Re: bug#76609: 31.0.50; The 0.1s repeat timer is very CPU-intensive; it might be a bug? Date: Thu, 27 Feb 2025 22:38:35 +0800
Compare to a bash script: while true; do sleep 0.1; date done above script have 0% CPU usage on my laptop. change it to 0.0001: while true; do sleep 0.0001; date done even 0.0001 s repeat, the bash script only have 4% cpu usage. So I think a 0.1s repeat timer in Emacs consume 45% is very surprise. I think maybe we should improve the timer performance On Thu, Feb 27, 2025 at 10:34 PM Eval Exec <execvy <at> gmail.com> wrote: > > 45% CPU for a 0.1s repeating timer does seem surprisingly high. Is > there a way we can optimize this, given the frequent timer > invocations? > > On Thu, Feb 27, 2025 at 10:27 PM Eli Zaretskii <eliz <at> gnu.org> wrote: > > > > > From: Eval Exec <execvy <at> gmail.com> > > > Date: Thu, 27 Feb 2025 21:55:40 +0800 > > > > > > I a 0.1 s repeat timer in emacs -Q, then Emacs's the cpu usage is 30% ~ > > > 70%. > > > I think it's a bug. > > > > I get around 45% with this, but why do you consider this a bug? Your > > timer function perhaps does nothing, but the timer machinery is > > invoked every 100 msec, and it does consume CPU. > > > > in addition, when you have a high-frequency timer, the Emacs idle loop > > is much more expensive, because instead of waiting inside pselect, it > > runs all the loop code every 100 msec. > > > > Maybe I'm missing something, but I don't see a bug here.
bug-gnu-emacs <at> gnu.org:bug#76609; Package emacs.
(Thu, 27 Feb 2025 15:06:01 GMT) Full text and rfc822 format available.Message #17 received at 76609 <at> debbugs.gnu.org (full text, mbox):
From: Eval Exec <execvy <at> gmail.com> To: Eli Zaretskii <eliz <at> gnu.org> Cc: 76609 <at> debbugs.gnu.org Subject: Re: bug#76609: 31.0.50; The 0.1s repeat timer is very CPU-intensive; it might be a bug? Date: Thu, 27 Feb 2025 23:05:03 +0800
I created test.el:
(defun exec/emacs-lisp-machine-update()
;; do nothing
)
(progn
(defvar exec/emacs-lisp-machine-timer nil)
(when (timerp exec/emacs-lisp-machine-timer)
(cancel-timer exec/emacs-lisp-machine-timer))
(setq exec/emacs-lisp-machine-timer
(run-with-timer 0.0 0.00001 'exec/emacs-lisp-machine-update))
)
then build emacs with --enable-profiling, then :
./bin/emacs -Q -l test.el
will get a gmon.out file, then I found:
❯ gprof ./bin/emacs gmon.out
Flat profile:
Each sample counts as 0.01 seconds.
% cumulative self self total
time seconds seconds calls Ts/call Ts/call name
48.00 0.84 0.84
process_mark_stack.lto_priv.0
5.71 0.94 0.10 mark_char_table
4.00 1.01 0.07 bidi_resolve_explicit
2.86 1.06 0.05 gui_produce_glyphs
2.29 1.10 0.04
face_before_or_after_it_pos.lto_priv.0
1.71 1.13 0.03 Ffuncall
1.71 1.16 0.03
move_it_in_display_line_to.constprop.1
1.14 1.18 0.02 Fassq
1.14 1.20 0.02 Fcommand_modes
1.14 1.22 0.02 bidi_level_of_next_char
1.14 1.24 0.02 bidi_move_to_visually_next
1.14 1.26 0.02 bidi_resolve_neutral
1.14 1.28 0.02 find_interval
1.14 1.30 0.02 ftcrfont_close.lto_priv.0
1.14 1.32 0.02 funcall_general
1.14 1.34 0.02 set_buffer_internal_2
0.57 1.35 0.01 Fcons
0.57 1.36 0.01 Fminus
0.57 1.37 0.01
Fnext_single_property_change
0.57 1.38 0.01 _init
0.57 1.39 0.01 assq_no_quit
0.57 1.40 0.01 bidi_cache_iterator_state
0.57 1.41 0.01
bidi_cache_search.constprop.0
0.57 1.42 0.01 bidi_explicit_dir_char
0.57 1.43 0.01 bidi_fetch_char
0.57 1.44 0.01
composition_compute_stop_pos
0.57 1.45 0.01
compute_line_metrics.lto_priv.0
0.57 1.46 0.01 display_line.lto_priv.0
0.57 1.47 0.01 do_symval_forwarding
0.57 1.48 0.01 face_for_char
0.57 1.49 0.01 fill_glyph_string
0.57 1.50 0.01 fix_position
0.57 1.51 0.01
ftcrfont_encode_char.lto_priv.0
0.57 1.52 0.01 ftcrfont_glyph_extents
0.57 1.53 0.01 get_keyelt.constprop.0
0.57 1.54 0.01
get_lface_attributes.lto_priv.0
0.57 1.55 0.01 indirect_function
0.57 1.56 0.01
internal_equal_1.lto_priv.0
0.57 1.57 0.01 make_interval
0.57 1.58 0.01
map_sub_char_table.lto_priv.0
0.57 1.59 0.01
mark_stack_push_value.lto_priv.0
0.57 1.60 0.01
mark_window_display_accurate_1
0.57 1.61 0.01 pgtk_set_glyph_string_gc
0.57 1.62 0.01
pgtk_window_is_of_frame_recursive.lto_priv.0
0.57 1.63 0.01 plist_get
0.57 1.64 0.01
produce_special_glyphs.lto_priv.0
0.57 1.65 0.01
set_cursor_from_row.lto_priv.0
0.57 1.66 0.01
set_iterator_to_next.lto_priv.0
0.57 1.67 0.01 specbind
0.57 1.68 0.01 start_display
0.57 1.69 0.01 substring_both
0.57 1.70 0.01
swap_in_symval_forwarding.lto_priv.0
0.57 1.71 0.01 sweep_strings.lto_priv.0
0.57 1.72 0.01 sweep_vectors.lto_priv.0
0.57 1.73 0.01 time_arith.lto_priv.0
0.57 1.74 0.01
traverse_intervals.constprop.0
0.57 1.75 0.01 unbind_to.constprop.0
% the percentage of the total running time of the
time program used by this function.
cumulative a running sum of the number of seconds accounted
seconds for by this function and those listed above it.
self the number of seconds accounted for by this
seconds function alone. This is the major sort for this
listing.
calls the number of times this function was invoked, if
this function is profiled, else blank.
self the average number of milliseconds spent in this
ms/call function per call, if this function is profiled,
else blank.
total the average number of milliseconds spent in this
ms/call function and its descendents per call, if this
function is profiled, else blank.
name the name of the function. This is the minor sort
for this listing. The index shows the location of
the function in the gprof listing. If the index is
in parenthesis it shows where it would appear in
the gprof listing if it were to be printed.
Copyright (C) 2012-2024 Free Software Foundation, Inc.
Copying and distribution of this file, with or without modification,
are permitted in any medium without royalty provided the copyright
notice and this notice are preserved.
On Thu, Feb 27, 2025 at 10:38 PM Eval Exec <execvy <at> gmail.com> wrote:
>
> Compare to a bash script:
> while true; do
> sleep 0.1;
> date
> done
>
> above script have 0% CPU usage on my laptop.
>
> change it to 0.0001:
> while true; do
> sleep 0.0001;
> date
> done
>
> even 0.0001 s repeat, the bash script only have 4% cpu usage.
>
> So I think a 0.1s repeat timer in Emacs consume 45% is very surprise.
> I think maybe we should improve the timer performance
>
> On Thu, Feb 27, 2025 at 10:34 PM Eval Exec <execvy <at> gmail.com> wrote:
> >
> > 45% CPU for a 0.1s repeating timer does seem surprisingly high. Is
> > there a way we can optimize this, given the frequent timer
> > invocations?
> >
> > On Thu, Feb 27, 2025 at 10:27 PM Eli Zaretskii <eliz <at> gnu.org> wrote:
> > >
> > > > From: Eval Exec <execvy <at> gmail.com>
> > > > Date: Thu, 27 Feb 2025 21:55:40 +0800
> > > >
> > > > I a 0.1 s repeat timer in emacs -Q, then Emacs's the cpu usage is 30% ~
> > > > 70%.
> > > > I think it's a bug.
> > >
> > > I get around 45% with this, but why do you consider this a bug? Your
> > > timer function perhaps does nothing, but the timer machinery is
> > > invoked every 100 msec, and it does consume CPU.
> > >
> > > in addition, when you have a high-frequency timer, the Emacs idle loop
> > > is much more expensive, because instead of waiting inside pselect, it
> > > runs all the loop code every 100 msec.
> > >
> > > Maybe I'm missing something, but I don't see a bug here.
bug-gnu-emacs <at> gnu.org:bug#76609; Package emacs.
(Thu, 27 Feb 2025 15:06:02 GMT) Full text and rfc822 format available.Message #20 received at 76609 <at> debbugs.gnu.org (full text, mbox):
From: Eli Zaretskii <eliz <at> gnu.org> To: Eval Exec <execvy <at> gmail.com> Cc: 76609 <at> debbugs.gnu.org Subject: Re: bug#76609: 31.0.50; The 0.1s repeat timer is very CPU-intensive; it might be a bug? Date: Thu, 27 Feb 2025 17:05:11 +0200
> From: Eval Exec <execvy <at> gmail.com> > Date: Thu, 27 Feb 2025 22:34:44 +0800 > Cc: 76609 <at> debbugs.gnu.org > > 45% CPU for a 0.1s repeating timer does seem surprisingly high. Is > there a way we can optimize this, given the frequent timer > invocations? We already optimize that as much as we can, AFAIK. What timers really need to run 10 times a second?
bug-gnu-emacs <at> gnu.org:bug#76609; Package emacs.
(Thu, 27 Feb 2025 15:08:01 GMT) Full text and rfc822 format available.Message #23 received at 76609 <at> debbugs.gnu.org (full text, mbox):
From: Eli Zaretskii <eliz <at> gnu.org> To: Eval Exec <execvy <at> gmail.com> Cc: 76609 <at> debbugs.gnu.org Subject: Re: bug#76609: 31.0.50; The 0.1s repeat timer is very CPU-intensive; it might be a bug? Date: Thu, 27 Feb 2025 17:07:07 +0200
> From: Eval Exec <execvy <at> gmail.com> > Date: Thu, 27 Feb 2025 22:38:35 +0800 > Cc: 76609 <at> debbugs.gnu.org > > Compare to a bash script: > while true; do > sleep 0.1; > date > done > > above script have 0% CPU usage on my laptop. > > change it to 0.0001: > while true; do > sleep 0.0001; > date > done > > even 0.0001 s repeat, the bash script only have 4% cpu usage. > > So I think a 0.1s repeat timer in Emacs consume 45% is very surprise. > I think maybe we should improve the timer performance This is not a serious argument, sorry. Look at the code Emacs runs in its idle loop, and you will understand how invalid is any comparison with a shell script which does little except sleeping for 0.1 sec.
bug-gnu-emacs <at> gnu.org:bug#76609; Package emacs.
(Thu, 27 Feb 2025 15:11:02 GMT) Full text and rfc822 format available.Message #26 received at 76609 <at> debbugs.gnu.org (full text, mbox):
From: Eval Exec <execvy <at> gmail.com> To: Eli Zaretskii <eliz <at> gnu.org> Cc: 76609 <at> debbugs.gnu.org Subject: Re: bug#76609: 31.0.50; The 0.1s repeat timer is very CPU-intensive; it might be a bug? Date: Thu, 27 Feb 2025 23:10:35 +0800
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> What timers really need to run 10 times a second? I'd like to create a timer to dynamically update the tab bar, similar to the effect shown in this video: [https://imgur.com/a/2QAtDQC]. Could you suggest some efficient ways to achieve this? On Thu, Feb 27, 2025 at 11:05 PM Eli Zaretskii <eliz <at> gnu.org> wrote: > > From: Eval Exec <execvy <at> gmail.com> > > Date: Thu, 27 Feb 2025 22:34:44 +0800 > > Cc: 76609 <at> debbugs.gnu.org > > > > 45% CPU for a 0.1s repeating timer does seem surprisingly high. Is > > there a way we can optimize this, given the frequent timer > > invocations? > > We already optimize that as much as we can, AFAIK. > > What timers really need to run 10 times a second? >
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bug-gnu-emacs <at> gnu.org:bug#76609; Package emacs.
(Thu, 27 Feb 2025 15:15:01 GMT) Full text and rfc822 format available.Message #29 received at 76609 <at> debbugs.gnu.org (full text, mbox):
From: Eval Exec <execvy <at> gmail.com> To: Eli Zaretskii <eliz <at> gnu.org> Cc: 76609 <at> debbugs.gnu.org Subject: Re: bug#76609: 31.0.50; The 0.1s repeat timer is very CPU-intensive; it might be a bug? Date: Thu, 27 Feb 2025 23:13:44 +0800
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> Look at the code Emacs runs in its idle loop Could you please guide me where is the idle loop related code in emacs source repo? which file and which lines ranges. Thank you. On Thu, Feb 27, 2025 at 11:07 PM Eli Zaretskii <eliz <at> gnu.org> wrote: > > From: Eval Exec <execvy <at> gmail.com> > > Date: Thu, 27 Feb 2025 22:38:35 +0800 > > Cc: 76609 <at> debbugs.gnu.org > > > > Compare to a bash script: > > while true; do > > sleep 0.1; > > date > > done > > > > above script have 0% CPU usage on my laptop. > > > > change it to 0.0001: > > while true; do > > sleep 0.0001; > > date > > done > > > > even 0.0001 s repeat, the bash script only have 4% cpu usage. > > > > So I think a 0.1s repeat timer in Emacs consume 45% is very surprise. > > I think maybe we should improve the timer performance > > This is not a serious argument, sorry. Look at the code Emacs runs in > its idle loop, and you will understand how invalid is any comparison > with a shell script which does little except sleeping for 0.1 sec. >
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bug-gnu-emacs <at> gnu.org:bug#76609; Package emacs.
(Thu, 27 Feb 2025 15:32:02 GMT) Full text and rfc822 format available.Message #32 received at 76609 <at> debbugs.gnu.org (full text, mbox):
From: Eli Zaretskii <eliz <at> gnu.org> To: Eval Exec <execvy <at> gmail.com> Cc: 76609 <at> debbugs.gnu.org Subject: Re: bug#76609: 31.0.50; The 0.1s repeat timer is very CPU-intensive; it might be a bug? Date: Thu, 27 Feb 2025 17:30:58 +0200
> From: Eval Exec <execvy <at> gmail.com> > Date: Thu, 27 Feb 2025 23:13:44 +0800 > Cc: 76609 <at> debbugs.gnu.org > > > Look at the code Emacs runs in its idle loop > > Could you please guide me where is the idle loop related code in emacs source repo? which file and which > lines ranges. It's in keyboard.c, in the function read_char.
bug-gnu-emacs <at> gnu.org:bug#76609; Package emacs.
(Thu, 27 Feb 2025 15:38:04 GMT) Full text and rfc822 format available.Message #35 received at 76609 <at> debbugs.gnu.org (full text, mbox):
From: Eli Zaretskii <eliz <at> gnu.org> To: Eval Exec <execvy <at> gmail.com> Cc: 76609 <at> debbugs.gnu.org Subject: Re: bug#76609: 31.0.50; The 0.1s repeat timer is very CPU-intensive; it might be a bug? Date: Thu, 27 Feb 2025 17:37:33 +0200
> From: Eval Exec <execvy <at> gmail.com> > Date: Thu, 27 Feb 2025 23:10:35 +0800 > Cc: 76609 <at> debbugs.gnu.org > > > What timers really need to run 10 times a second? > > I'd like to create a timer to dynamically update the tab bar, similar to the effect shown in this video: > [https://imgur.com/a/2QAtDQC]. Then why are you worried by the CPU usage? This is similar to performing redisplay of a portion of a window because the user presses keys at 10 Hz rate. If I press and hold the <RIGHT> arrow, I get similar CPU usage (my keyboard auto-repeat rate is about 50/sec). Each <RIGHT> keypress causes Emacs to draw 2 characters: the one from which the cursor moves and the one to which it moves.
bug-gnu-emacs <at> gnu.org:bug#76609; Package emacs.
(Thu, 27 Feb 2025 15:45:02 GMT) Full text and rfc822 format available.Message #38 received at 76609 <at> debbugs.gnu.org (full text, mbox):
From: Eval Exec <execvy <at> gmail.com> To: Eli Zaretskii <eliz <at> gnu.org> Cc: 76609 <at> debbugs.gnu.org Subject: Re: bug#76609: 31.0.50; The 0.1s repeat timer is very CPU-intensive; it might be a bug? Date: Thu, 27 Feb 2025 23:44:16 +0800
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> Then why are you worried by the CPU usage? Because I use laptop with battery everyday, I want to let Emacs more powersave. Get a better battery life. On Thu, Feb 27, 2025 at 11:37 PM Eli Zaretskii <eliz <at> gnu.org> wrote: > > From: Eval Exec <execvy <at> gmail.com> > > Date: Thu, 27 Feb 2025 23:10:35 +0800 > > Cc: 76609 <at> debbugs.gnu.org > > > > > What timers really need to run 10 times a second? > > > > I'd like to create a timer to dynamically update the tab bar, similar to > the effect shown in this video: > > [https://imgur.com/a/2QAtDQC]. > > Then why are you worried by the CPU usage? This is similar to > performing redisplay of a portion of a window because the user presses > keys at 10 Hz rate. If I press and hold the <RIGHT> arrow, I get > similar CPU usage (my keyboard auto-repeat rate is about 50/sec). > Each <RIGHT> keypress causes Emacs to draw 2 characters: the one from > which the cursor moves and the one to which it moves. >
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bug-gnu-emacs <at> gnu.org:bug#76609; Package emacs.
(Thu, 27 Feb 2025 16:47:02 GMT) Full text and rfc822 format available.Message #41 received at 76609 <at> debbugs.gnu.org (full text, mbox):
From: Eli Zaretskii <eliz <at> gnu.org> To: Eval Exec <execvy <at> gmail.com> Cc: 76609 <at> debbugs.gnu.org Subject: Re: bug#76609: 31.0.50; The 0.1s repeat timer is very CPU-intensive; it might be a bug? Date: Thu, 27 Feb 2025 18:46:05 +0200
> From: Eval Exec <execvy <at> gmail.com> > Date: Thu, 27 Feb 2025 23:44:16 +0800 > Cc: 76609 <at> debbugs.gnu.org > > > Then why are you worried by the CPU usage? > Because I use laptop with battery everyday, I want to let Emacs more powersave. Get a better battery life. Running a high-frequency timer with non-trivial processing is incompatible with saving battery. This is why any significant processing in an otherwise idle Emacs is considered a misfeature. So users who want to save battery should be advised not to turn on features such as the one you want to provide, because in Emacs moving text on display at high frequency is not cheap, even without the processing done for high-frequency timers.
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