Package: emacs;
Reported by: Sujith <m.sujith <at> gmail.com>
Date: Fri, 29 Dec 2017 03:54:01 UTC
Severity: normal
Found in version 27.0.50
Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):
From: Sujith <m.sujith <at> gmail.com> To: bug-gnu-emacs <at> gnu.org Subject: 27.0.50; Slow visual selection Date: Fri, 29 Dec 2017 09:22:22 +0530
Visual selection of text becomes very slow and hogs the
CPU in some cases.
For example, open the file lisp/progmodes/vhdl-mode.el in
the emacs codebase. And then, to reproduce this issue:
* Scroll patiently to the bottom using C-v.
(this is essential, jumping to the bottom doesn't seem to bring
up this issue).
* Set mark with C-SPC.
* Go to the beginning with M-<.
* Now move the cursor up and down.
The selection is jerky and CPU usage is very high.
I have tried this with emacs -Q and can see the issue. I am using
the master branch.
A profile report with this issue:
- #<compiled 0x41937d> 2499 53%
- filter-buffer-substring 2499 53%
- buffer-substring--filter 2499 53%
- #<compiled 0x17002e5> 2499 53%
apply 2499 53%
- ... 2102 44%
Automatic GC 2085 44%
- minibuffer-complete 17 0%
- completion-in-region 17 0%
- completion--in-region 17 0%
- #<compiled 0x10e5b45> 17 0%
- apply 17 0%
- #<compiled 0x243ba7> 17 0%
- completion--in-region-1 17 0%
- completion--do-completion 17 0%
- completion-try-completion 17 0%
- completion--nth-completion 17 0%
- completion--some 17 0%
- #<compiled 0x52cfb1> 17 0%
- completion-basic-try-completion 17 0%
- try-completion 17 0%
- #<compiled 0x24664f> 17 0%
complete-with-action 17 0%
+ command-execute 87 1%
+ gui-set-selection 16 0%
+ redisplay_internal (C function) 3 0%
If any more information is needed, please let me know !
In GNU Emacs 27.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 2.24.31)
of 2017-12-28 built on the-damned
Repository revision: b19df8ae78cdebe76512a70f76ec68677de41c11
Windowing system distributor 'The X.Org Foundation', version 11.0.11906000
Recent messages:
mwheel-scroll: Beginning of buffer [6 times]
scroll-down-command: Beginning of buffer
Undo!
uncompressing simple.el.gz...done
Note: file is write protected
uncompressing simple.el.gz...done
Note: file is write protected
scroll-down-command: Beginning of buffer [5 times]
Quit [2 times]
Making completion list...
Configured using:
'configure --prefix=/usr --without-gconf --without-gsettings
--without-selinux --without-gnutls --without-libsystemd
--without-threads --without-dbus --with-x-toolkit=gtk2'
Configured features:
XPM JPEG TIFF GIF PNG RSVG SOUND GPM NOTIFY ACL LIBXML2 FREETYPE
M17N_FLT LIBOTF XFT ZLIB TOOLKIT_SCROLL_BARS GTK2 X11 LCMS2
Important settings:
value of $LANG: en_IN.UTF-8
locale-coding-system: utf-8-unix
Major mode: Shell
Minor modes in effect:
global-magit-file-mode: t
diff-auto-refine-mode: t
magit-auto-revert-mode: t
global-git-commit-mode: t
async-bytecomp-package-mode: t
shell-dirtrack-mode: t
display-time-mode: t
iswitchb-mode: t
savehist-mode: t
override-global-mode: t
save-place-mode: t
cl-old-struct-compat-mode: t
tooltip-mode: t
global-eldoc-mode: t
mouse-wheel-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
blink-cursor-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
column-number-mode: 1
line-number-mode: t
transient-mark-mode: t
Load-path shadows:
None found.
Features:
(shadow flyspell ispell face-remap emacsbug cc-mode cc-fonts cc-guess
cc-menus cc-cmds cc-styles cc-align cc-engine cc-vars cc-defs help-fns
radix-tree find-func profiler dired-aux elec-pair mu4e-alert pcase ht s
alert log4e rx notifications dbus xml gntp magit-obsolete magit-blame
magit-stash magit-bisect magit-remote magit-commit magit-sequence
magit-notes magit-worktree magit-branch magit-collab ghub url-auth url
url-proxy url-privacy url-expand url-methods url-history url-cookie
url-domsuf url-util mailcap let-alist magit-files magit-refs
magit-status magit magit-repos magit-apply magit-wip magit-log
magit-diff smerge-mode diff-mode magit-core magit-autorevert autorevert
filenotify magit-process magit-margin magit-mode git-commit magit-git
magit-section magit-utils crm magit-popup log-edit pcvs-util add-log
with-editor cl-extra help-mode async-bytecomp async shell pcomplete dash
advice mu4e-contrib mu4e desktop frameset mu4e-speedbar speedbar
sb-image ezimage dframe mu4e-main mu4e-context mu4e-view cal-menu
calendar cal-loaddefs thingatpt browse-url comint ansi-color
mu4e-headers mu4e-compose mu4e-draft mu4e-actions ido rfc2368 smtpmail
sendmail mu4e-mark mu4e-message html2text mu4e-proc mu4e-utils doc-view
jka-compr image-mode mu4e-lists mu4e-vars message rmc puny format-spec
rfc822 mml mml-sec epa derived epg gnus-util rmail rmail-loaddefs
mm-decode mm-bodies mm-encode mail-parse rfc2231 rfc2047 rfc2045 mm-util
ietf-drums mail-prsvr mailabbrev mail-utils gmm-utils mailheader hl-line
cl mu4e-meta battery time dired-x dired dired-loaddefs edmacro kmacro
xcscope ring zenburn-theme server iswitchb savehist bind-key easy-mmode
saveplace finder-inf info package easymenu epg-config url-handlers
url-parse auth-source cl-seq eieio eieio-core cl-macs eieio-loaddefs
password-cache json map url-vars seq byte-opt gv bytecomp byte-compile
cconv cl-loaddefs cl-lib time-date mule-util tooltip eldoc electric
uniquify ediff-hook vc-hooks lisp-float-type mwheel term/x-win x-win
term/common-win x-dnd tool-bar dnd fontset image regexp-opt fringe
tabulated-list replace newcomment text-mode elisp-mode lisp-mode
prog-mode register page menu-bar rfn-eshadow isearch timer select
scroll-bar mouse jit-lock font-lock syntax facemenu font-core
term/tty-colors frame cl-generic 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 charscript charprop case-table epa-hook jka-cmpr-hook
help simple abbrev obarray minibuffer cl-preloaded nadvice loaddefs
button faces cus-face macroexp files text-properties overlay sha1 md5
base64 format env code-pages mule custom widget hashtable-print-readable
backquote inotify lcms2 dynamic-setting font-render-setting move-toolbar
gtk x-toolkit x multi-tty make-network-process emacs)
Memory information:
((conses 16 385737 51929)
(symbols 48 34919 1)
(miscs 40 105 376)
(strings 32 75656 5006)
(string-bytes 1 2341110)
(vectors 16 54734)
(vector-slots 8 1167949 49516)
(floats 8 149 357)
(intervals 56 42540 1784)
(buffers 992 18))
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