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

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Message #574 received at 56682 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Gregory Heytings <gregory <at> heytings.org>
Cc: 56682 <at> debbugs.gnu.org, monnier <at> iro.umontreal.ca, dgutov <at> yandex.ru
Subject: Re: bug#56682: Fix the long lines font locking related slowdowns
Date: Mon, 01 Aug 2022 16:19:33 +0300

> Date: Mon, 01 Aug 2022 13:14:20 +0000
> From: Gregory Heytings <gregory <at> heytings.org>
> cc: dgutov <at> yandex.ru, 56682 <at> debbugs.gnu.org, monnier <at> iro.umontreal.ca
> 
> > You can maybe have that for C-p that follows M->, but wouldn't the wait 
> > return, with a vengeance, if you insert a single character (because then 
> > the buffer needs to be re-scanned)?  If so, we've gained nothing, 
> > really.
> 
> Fortunately no: the buffer doesn't need to be rescanned, syntax-ppss 
> caches its result, to avoid having to rescan the whole buffer again and 
> again.

But the buffer has changed, so the cache is not necessarily valid,
right?

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