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

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Package: emacs;

Reported by: Gregory Heytings <gregory <at> heytings.org>

Date: Thu, 21 Jul 2022 18:01:01 UTC

Severity: normal

Done: Gregory Heytings <gregory <at> heytings.org>

Bug is archived. No further changes may be made.

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Message #182 received at 56682 <at> debbugs.gnu.org (full text, mbox):

From: Gregory Heytings <gregory <at> heytings.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: Gerd Möllmann <gerd.moellmann <at> gmail.com>,
 56682 <at> debbugs.gnu.org, monnier <at> iro.umontreal.ca
Subject: Re: bug#56682: Fix the long lines font locking related slowdowns
Date: Mon, 25 Jul 2022 21:47:55 +0000

>
> 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.)
>

Hmmm...  After 350e97d78e, Isearch locks Emacs with toggle-truncate-lines. 
Recipe:

C-x C-f long-line.xml
C-x x t
C-s </

You have to kill Emacs, C-g does not work.
This bug report was last modified 2 years and 8 days ago.

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