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bug#58558: 29.0.50; re-search-forward is slow in some buffers
From: |
Alan Mackenzie |
Subject: |
bug#58558: 29.0.50; re-search-forward is slow in some buffers |
Date: |
Wed, 12 Apr 2023 15:59:42 +0000 |
Hello, Eli.
On Wed, Apr 12, 2023 at 18:22:22 +0300, Eli Zaretskii wrote:
> > From: Stefan Monnier <monnier@iro.umontreal.ca>
> > Cc: acm@muc.de, yantar92@posteo.net, larsi@gnus.org,
> > 58558@debbugs.gnu.org
> > Date: Wed, 12 Apr 2023 10:38:50 -0400
> > > Also, that code was there in Emacs 28 as well, so how come it suddenly
> > > has this effect now?
> > The effect of the code depends on whether the buffer that's current when
> > `cc-defs.el` is loaded has set `parse-sexp-lookup-properties`
> > buffer-locally or not.
> > I don't have Emacs-28 at hand, but the value of
> > `parse-sexp-lookup-properties` in *scratch* is (buffer-local) t in
> > Emacs-29 and (global) nil in Emacs-27.
> Ah, okay. So in Emacs 29 we started setting this variable locally in
> some buffers? Do you happen to know where's the change which caused
> that, and why was it done?
I suspect this commit as the cause:
commit 6ccc4b6bc8a14daca6b3e3250574752c90c1eb9b
Author: Noam Postavsky <npostavs@gmail.com>
Date: Fri May 6 18:31:00 2022 +0200
Handle elisp #-syntax better in Emacs Lisp mode
* elisp-mode.el (elisp-mode-syntax-propertize): New function.
(emacs-lisp-mode): Set it as syntax-propertize-function (bug#15998).
Lisp Interaction Mode is derived from Emacs Lisp Mode. Whenever there
is a non-nil syntax-propertize-function, run-mode-hooks sets
parse-sexp-lookup-properties to t.
This is probably harmless in *scratch*.
--
Alan Mackenzie (Nuremberg, Germany).
- bug#58558: 29.0.50; re-search-forward is slow in some buffers, (continued)
- bug#58558: 29.0.50; re-search-forward is slow in some buffers, Stefan Monnier, 2023/04/10
- bug#58558: 29.0.50; re-search-forward is slow in some buffers, Ihor Radchenko, 2023/04/11
- bug#58558: 29.0.50; re-search-forward is slow in some buffers, Eli Zaretskii, 2023/04/11
- bug#58558: 29.0.50; re-search-forward is slow in some buffers, Ihor Radchenko, 2023/04/12
- bug#58558: 29.0.50; re-search-forward is slow in some buffers, Stefan Monnier, 2023/04/12
- bug#58558: 29.0.50; re-search-forward is slow in some buffers, Eli Zaretskii, 2023/04/12
- bug#58558: 29.0.50; re-search-forward is slow in some buffers, Stefan Monnier, 2023/04/12
- bug#58558: 29.0.50; re-search-forward is slow in some buffers, Eli Zaretskii, 2023/04/12
- bug#58558: 29.0.50; re-search-forward is slow in some buffers,
Alan Mackenzie <=
- bug#58558: 29.0.50; re-search-forward is slow in some buffers, Stephen Berman, 2023/04/12
- bug#58558: 29.0.50; re-search-forward is slow in some buffers, Ihor Radchenko, 2023/04/12
- bug#58558: 29.0.50; re-search-forward is slow in some buffers, Ihor Radchenko, 2023/04/12
- bug#58558: 29.0.50; re-search-forward is slow in some buffers, Stefan Monnier, 2023/04/12
- bug#58558: 29.0.50; re-search-forward is slow in some buffers, Stefan Monnier, 2023/04/12
- bug#58558: 29.0.50; re-search-forward is slow in some buffers, Stefan Monnier, 2023/04/13
- bug#58558: 29.0.50; re-search-forward is slow in some buffers, Ihor Radchenko, 2023/04/13
- bug#58558: 29.0.50; re-search-forward is slow in some buffers, Eli Zaretskii, 2023/04/13
- bug#58558: 29.0.50; re-search-forward is slow in some buffers, Eli Zaretskii, 2023/04/13
- bug#58558: 29.0.50; re-search-forward is slow in some buffers, Alan Mackenzie, 2023/04/12