GNU bug report logs - #56682
Fix the long lines font locking related slowdowns

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From: Gerd Möllmann <gerd.moellmann <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 56682 <at> debbugs.gnu.org, gregory <at> heytings.org, monnier <at> iro.umontreal.ca
Subject: bug#56682: Fix the long lines font locking related slowdowns
Date: Sat, 23 Jul 2022 16:25:34 +0200

Eli Zaretskii <eliz <at> gnu.org> writes:

> And I've found a serious sink of CPU cycles under truncate-lines, and
> installed a fix on the feature branch.  Gerd, if you have time to
> eyeball the fix and comment on it, I'd appreciate.  It's commit
> 350e97d on the branch.  (I can post a more detailed explanation of
> what I did and why, if that would help, because the code and the
> functions it calls are somewhat tricky.)

I'll look at it and come back.

BTW, does feature/long-lines-and-font-locking] build for you?  I'm getting

In toplevel form:
cedet/semantic/symref/list.el:35:2: Error: Wrong type argument: number-or-marker-p, nil
make[2]: *** [cedet/semantic/symref/list.elc] Error 1
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [compile-main] Error 2
make: *** [lisp] Error 2

Configured --with-native-compilation.

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