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: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Dmitry Gutov <dgutov <at> yandex.ru>
Cc: 56682 <at> debbugs.gnu.org, Eli Zaretskii <eliz <at> gnu.org>, gregory <at> heytings.org
Subject: bug#56682: feature/improved-locked-narrowing 9dee6df39c: Reworked locked narrowing.
Date: Mon, 30 Jan 2023 16:49:34 -0500

> Also note that previously, I'd never have suggested that redisplay code
>  changes the value of font-lock-dont-widen.

It would be ugly for redisplay code to mess with font-lock data like
`font-lock-dont-widen`.  Instead, it should let-bind its own variable to
indicate that the long-lines code has currently installed a narrowing,
and `font-lock.el` can decide whether to pay attention to that var.


        Stefan
This bug report was last modified 2 years and 8 days ago.

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