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

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Message #682 received at 56682 <at> debbugs.gnu.org (full text, mbox):

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>,
 monnier <at> iro.umontreal.ca
Subject: Re: bug#56682: Fix the long lines font locking related slowdowns
Date: Tue, 02 Aug 2022 15:06:17 +0000

>
> Whether they do or not, font-lock widens by default, see 
> font-lock-dont-widen.
>

And even if one sets font-lock-dont-widen to nil, mode authors are 
completely free to ignore that setting (assuming they're aware it exists).

>
> If we're able to demonstrate that the remaining bottlenecks are inside 
> font-lock, it should be easier to improve there.
>

It has been demonstrated, as far as I can see, and repeatedly so.

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