bug#74691: Long errors with flymake-show-diagnostics-at-end-of-line really slows movement

bug#74691: Long errors with flymake-show-diagnostics-at-end-of-line really slows movement

[spl3g]

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Hello,

When the error is so large that it takes up several lines, any buffer
action is done with a substantial delay.

Example of that error:
[image: image.png]


In GNU Emacs 30.0.92 (build 1, x86_64-pc-linux-gnu, GTK+ Version
3.24.43, cairo version 1.18.2)
System Description: NixOS 25.05 (Warbler)

Configured using:
 'configure
 --prefix=/nix/store/kdcv18ksfq345gaalphckqh53kn14b79-emacs-pgtk-30.0.92
 --disable-build-details --with-modules --with-pgtk
 --with-compress-install --with-toolkit-scroll-bars
 --with-native-compilation --without-imagemagick --with-mailutils
 --without-small-ja-dic --with-tree-sitter --without-xinput2
 --without-xwidgets --with-dbus --with-selinux'

Configured features:
CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG
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 $EMACSLOADPATH:
  value of $EMACSNATIVELOADPATH:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: TypeScript

Minor modes in effect:
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  eat-eshell-visual-command-mode: t
  eat-eshell-mode: t
  eglot-inlay-hints-mode: t
  eglot--managed-mode: t
  flymake-mode: t
  corfu-popupinfo-mode: t
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  global-corfu-mode: t
  corfu-mode: t
  server-mode: t
  display-line-numbers-mode: t
  indent-guide-mode: t
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  apheleia-mode: t
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  recentf-mode: t
  save-place-mode: t
  electric-pair-mode: t
  which-key-mode: t
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  override-global-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-regexp-mode: t
  line-number-mode: t
  global-visual-line-mode: t
  visual-line-mode: t
  transient-mark-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t

Load-path shadows:
/nix/store/mjr52ssd4ihj3qprj7hlq1cl686asf97-emacs-packages-deps/share/emacs/site-lisp/site-start
hides
/nix/store/kdcv18ksfq345gaalphckqh53kn14b79-emacs-pgtk-30.0.92/share/emacs/site-lisp/site-start

Features:
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Memory information:
((conses 16 3504364 472450) (symbols 48 119028 6) (strings 32 497254 23980)
 (string-bytes 1 14284234) (vectors 16 129051) (vector-slots 8 2462135
291002)
 (floats 8 1388 21668) (intervals 56 188721 11562) (buffers 992 130))

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bug#74691: Long errors with flymake-show-diagnostics-at-end-of-line really slows movement

[Eli Zaretskii]

> From: spl3g <spleefer6@gmail.com>
> Date: Wed, 4 Dec 2024 18:50:55 +0300
> 
> When the error is so large that it takes up several lines, any buffer action is done with a substantial delay.
> 
> Example of that error:
> image.png

I cannot reproduce that.  I simulated Flymake's diagnostics by
defining an overlay with a long 'before-string' at the end of line,
but couldn't see any delays.

If you (or someone else) can show a recipe that I could try to
reproduce the delays, I will gladly look into this.

bug#74691: Long errors with flymake-show-diagnostics-at-end-of-line really slows movement

[Eli Zaretskii]

[Please use Reply All to reply, so as to keep the bug tracker CC'ed.]

> From: spl3g <spleefer6@gmail.com>
> Date: Sat, 7 Dec 2024 22:12:50 +0300
> 
> Oh, I think it is mostly my configuration's fault. But I could reproduce it a little bit with emacs -Q if I set (setq
> scroll-conservatively 101) and move beyond the screen.

I tried that now with scroll-conservatively, but I still cannot
reproduce.

What is the major mode in the buffer where you see this?

bug#74691: Long errors with flymake-show-diagnostics-at-end-of-line really slows movement

[spl3g]

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I was using typescript-ts-mode. Also just tried js-mode but it gave the
same results.

сб, 7 дек. 2024 г. в 22:26, Eli Zaretskii <eliz@gnu.org>:

> [Please use Reply All to reply, so as to keep the bug tracker CC'ed.]
>
> > From: spl3g <spleefer6@gmail.com>
> > Date: Sat, 7 Dec 2024 22:12:50 +0300
> >
> > Oh, I think it is mostly my configuration's fault. But I could reproduce
> it a little bit with emacs -Q if I set (setq
> > scroll-conservatively 101) and move beyond the screen.
>
> I tried that now with scroll-conservatively, but I still cannot
> reproduce.
>
> What is the major mode in the buffer where you see this?
>

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bug#74691: Long errors with flymake-show-diagnostics-at-end-of-line really slows movement

[Eli Zaretskii]

> From: spl3g <spleefer6@gmail.com>
> Date: Tue, 10 Dec 2024 16:33:16 +0300
> Cc: 74691@debbugs.gnu.org
> 
> I was using typescript-ts-mode. Also just tried js-mode but it gave the same results.

Still cannot reproduce, sorry.

Can you invoke "M-x profiler-start RET RET", then run your
reproduction recipe for at least 10 to 20 seconds, then type
"M-x profiler-report", and post the full expanded profile here?  To
expand the profile, type "C-u RET" in the profile buffer, and then
make sure there are no lines preceded with "+", which means they were
not expanded; typing RET on each such line will expand it.

Perhaps looking at the profile will give us some clues.

bug#74691: Long errors with flymake-show-diagnostics-at-end-of-line really slows movement

[Eli Zaretskii]

Ping!

> Cc: 74691@debbugs.gnu.org
> Date: Thu, 12 Dec 2024 13:00:40 +0200
> From: Eli Zaretskii <eliz@gnu.org>
> 
> > From: spl3g <spleefer6@gmail.com>
> > Date: Tue, 10 Dec 2024 16:33:16 +0300
> > Cc: 74691@debbugs.gnu.org
> > 
> > I was using typescript-ts-mode. Also just tried js-mode but it gave the same results.
> 
> Still cannot reproduce, sorry.
> 
> Can you invoke "M-x profiler-start RET RET", then run your
> reproduction recipe for at least 10 to 20 seconds, then type
> "M-x profiler-report", and post the full expanded profile here?  To
> expand the profile, type "C-u RET" in the profile buffer, and then
> make sure there are no lines preceded with "+", which means they were
> not expanded; typing RET on each such line will expand it.
> 
> Perhaps looking at the profile will give us some clues.
> 
> 
> 
>