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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From: Gregory Heytings <gregory <at> heytings.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 56682 <at> debbugs.gnu.org, Stefan Monnier <monnier <at> iro.umontreal.ca>, dgutov <at> yandex.ru
Subject: bug#56682: locked narrowing
Date: Fri, 02 Dec 2022 08:08:01 +0000

>
> Once again, there's absolutely no reason to scan more than a limited 
> region around point where redisplay is likely to look.
>

That's correct if, and only if, we do that scan each time redisplay is 
called.  If we do that only from time to time, based on some heuristics, 
it is not correct anymore, as I explained repeatedly.
This bug report was last modified 2 years and 8 days ago.

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