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: Dmitry Gutov <dgutov <at> yandex.ru>
Cc: 56682 <at> debbugs.gnu.org, Eli Zaretskii <eliz <at> gnu.org>, Stefan Monnier <monnier <at> iro.umontreal.ca>
Subject: bug#56682: Fix the long lines font locking related slowdowns
Date: Fri, 05 Aug 2022 12:42:12 +0000

[Message part 1 (text/plain, inline)]
>>> The locked narrowing currently in effect makes it impossible to 
>>> investigate this problem or improve the behavior :-(
>> 
>> How so?  It is fully backward compatible, just (setq 
>> long-line-threshold nil).  If what you want is only to remove the 
>> locked narrowing, comment out the relevant line in xdisp.c.
>
> That brings back the performance problems in redisplay, which have a 
> more pronounced effect, overshadowing both issues and potential 
> improvements in font-lock.
>

The first option does, the second does not.
This bug report was last modified 2 years and 8 days ago.

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