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

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Gregory Heytings <gregory <at> heytings.org>
Cc: 56682 <at> debbugs.gnu.org, Eli Zaretskii <eliz <at> gnu.org>,
 Dmitry Gutov <dgutov <at> yandex.ru>
Subject: Re: bug#56682: Fix the long lines font locking related slowdowns
Date: Sun, 31 Jul 2022 18:47:14 -0400

> That's true, but with such big files, the initial scan is slow.  So the
> scenario is simple: you open a big enough file, type M->, and C-p.  M-> will
> be instantaneous, and C-p will take a while, because of syntax-ppss.

Really?  I'd expect that `M->` is slow because of `syntax-ppss`
(called by font-lock) and then `C-p` is instantaneous.


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

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