GNU bug report logs - #79924
31.0.50; nxml-mode + diff don't clean the timers

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: OGAWA Hirofumi <hirofumi <at> mail.parknet.co.jp>
To: bug-gnu-emacs <at> gnu.org
Subject: 31.0.50; nxml-mode + diff don't clean the timers
Date: Mon, 01 Dec 2025 14:38:41 +0900

Hi,

I noticed emacs became slower much when I diff xml files repeatedly. And
after some investigate, there are so many timers in the output of
`list-timers'.

(with-temp-buffer
  (message "before: %S"
           (mapcar (lambda (x)
                     (timer--function x))
                   (append timer-idle-list)))
  (nxml-mode)
  (insert "<item>\n</item>")
  (let ((buf-a (current-buffer)))
    (with-temp-buffer
      (nxml-mode)
      (let ((diff-win (diff-buffers buf-a (current-buffer))))
        (sit-for 1)
        (let ((kill-buf (window-buffer diff-win)))
          (delete-window diff-win)
          (kill-buffer kill-buf)))))
  (message "after: %S"
           (mapcar (lambda (x)
                     (timer--function x))
                   (append timer-idle-list))))

The above code is to reproduce the issue. With evaluating the code,
`rng-validate-quick-while-idle' and `rng-validate-while-idle' are left
in `timer-idle-list' without cleaning up. (diff buffers or files don't
matter.)

Thanks.


In GNU Emacs 31.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version
 3.24.51, cairo version 1.18.4) of 2025-11-30 built on devron
Repository revision: ef903e0f5ac27c80a2d3429392a82c3d24795c55
Repository branch: master
System Description: Debian GNU/Linux forky/sid

Configured using:
 'configure --with-x-toolkit=gtk3 --without-xim --with-imagemagick
 --with-wide-int --with-native-compilation=aot --with-pgtk'

Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GSETTINGS HARFBUZZ
IMAGEMAGICK JPEG LCMS2 LIBOTF LIBSELINUX LIBSYSTEMD 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 $LANG: ja_JP.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: Group

Minor modes in effect:
  gnus-topic-mode: t
  gnus-undo-mode: t
  bug-reference-mode: t
  server-mode: t
  editorconfig-mode: t
  flycheck-pos-tip-mode: t
  global-flycheck-mode: t
  global-company-mode: t
  company-mode: t
  auto-insert-mode: t
  yas-global-mode: t
  yas-minor-mode: t
  electric-pair-mode: t
  icomplete-mode: t
  which-key-mode: t
  savehist-mode: t
  repeat-mode: t
  tty-tip-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  eldoc-mode: t
  show-paren-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  minibuffer-nonselected-mode: t
  minibuffer-regexp-mode: t
  buffer-read-only: t
  column-number-mode: t
  line-number-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:
None found.

Features:
(shadow emacsbug lisp-mnt bbdb-message mailalias cursor-sensor cl-print
display-line-numbers timer-list novice smerge-mode diff sort gnus-cite
shr-color color mm-archive mail-extr gnus-bcklg bbdb-gnus-aux qp gnus-ml
disp-table mule-util ibuffer ibuffer-loaddefs textsec uni-scripts
idna-mapping ucs-normalize uni-confusable textsec-check go-mode
find-file ffap hl-line elfeed-show elfeed-search bookmark elfeed-csv
elfeed elfeed-curl elfeed-log elfeed-db elfeed-lib avl-tree url-queue
xml-query gnus-topic url-http url-gw url-cache utf-7 auth-source-kpxc
secrets network-stream nsm nnfolder bbdb-gnus nnnil bbdb-mua spam
spam-stat bbdb-com crm bbdb bbdb-site timezone gnus-uu yenc gnus-demon
gnus-async gnus-delay gnus-draft gnus-agent gnus-srvr gnus-score
score-mode nnvirtual nntp gnus-cache gnus-msg gnus-art mm-uu mml2015
mm-view mml-smime smime gnutls dig gnus-sum shr pixel-fill kinsoku
url-file svg dom nndraft nnmh gnus-xoauth2 oauth2-ext plstore
auth-source-pass gnus-group gnus-undo gnus-start gnus-dbus dbus xml
gnus-cloud nnimap nnmail mail-source utf7 nnoo parse-time iso8601
gnus-spec gnus-int gnus-range message sendmail yank-media puny rfc822
mml mml-sec epa derived epg rfc6068 epg-config mm-decode mm-bodies
mm-encode mail-parse rfc2231 rfc2047 rfc2045 ietf-drums mailabbrev
gmm-utils mailheader gnus-win gnus nnheader gnus-util time-date
mail-utils range mm-util mail-prsvr dired-aux grep-context dash flyspell
ispell vc-hg vc-git diff-mode track-changes files-x vc-bzr vc-src
vc-sccs vc-svn vc-cvs vc-rcs log-view log-edit add-log easy-mmode
pcvs-util vc vc-dispatcher bug-reference thingatpt server url-auth
generic-x editorconfig editorconfig-core editorconfig-core-handle
editorconfig-fnmatch flycheck-relint relint compile text-property-search
comint ansi-osc xr flycheck-pos-tip pos-tip flycheck find-func
company-oddmuse company-keywords company-etags etags fileloop generator
xref project ring company-cscope company-gtags company-dabbrev-code
company-dabbrev company-files company-clang company-capf company-cmake
company-semantic company-template company-yasnippet company-bbdb company
pcase autoinsert yasnippet elec-pair icomplete which-key dircolors-faces
ansi-color dired-x savehist advice browse-kill-ring delsel
tab-bar-session desktop frameset repeat tty-tip comp comp-cstr cl-extra
help-mode warnings comp-run comp-common rx mozc-im-plus
mozc-cand-posframe s posframe mozc magit-mini-autoloads llama-autoloads
cond-let-autoloads packages-autoloads pdd-autoloads vcard-autoloads
startup-elisp-autoloads rfc-autoloads mozc-im-plus-autoloads
misc-autoloads lookup-autoloads gt-autoloads gnus-xoauth2-autoloads
cxrefs-autoloads company-cscope-autoloads bbdb-loaddefs cus-edit pp
cus-start cus-load wid-edit browse-kill-ring-autoloads
cmake-mode-autoloads company-autoloads coterm-autoloads
csv-mode-autoloads dockerfile-mode-autoloads dpkg-dev-el-autoloads
debian-el-autoloads debian-el dired dired-loaddefs dumb-jump-autoloads
elfeed-autoloads expand-region-autoloads flycheck-relint-autoloads
flycheck-rust-autoloads dash-autoloads flycheck-autoloads
git-modes-autoloads info gnuplot-autoloads go-mode-autoloads
gptel-autoloads graphviz-dot-mode-autoloads grep-context-autoloads
markdown-mode-autoloads meson-mode-autoloads
mozc-cand-posframe-autoloads mozc-autoloads php-mode-autoloads
po-mode-autoloads popup-autoloads pos-tip-autoloads posframe-autoloads
relint-autoloads rpm-spec-mode-autoloads rust-mode-autoloads s-autoloads
vundo-autoloads xr-autoloads yaml-mode-autoloads yasnippet-autoloads
package browse-url xdg 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 subr-x map byte-opt gv bytecomp byte-compile
url-vars cl-loaddefs cl-lib japan-util 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 671168 380413) (symbols 48 31926 8)
 (strings 32 247784 36331) (string-bytes 1 9086180)
 (vectors 16 124050) (vector-slots 8 1721099 150050)
 (floats 8 10182 35256) (intervals 56 4707 1242) (buffers 1064 34))

-- 
OGAWA Hirofumi <hirofumi <at> mail.parknet.co.jp>

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