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 #2166 received at 56682 <at> debbugs.gnu.org (full text, mbox):

From: Dmitry Gutov <dgutov <at> yandex.ru>
To: Gregory Heytings <gregory <at> heytings.org>
Cc: 56682 <at> debbugs.gnu.org, Eli Zaretskii <eliz <at> gnu.org>,
 monnier <at> iro.umontreal.ca
Subject: Re: bug#56682: feature/improved-locked-narrowing 9dee6df39c: Reworked
 locked narrowing.
Date: Tue, 31 Jan 2023 18:03:28 +0200

On 31/01/2023 17:17, Gregory Heytings wrote:
> 
>>
>> note that a significant part of the redisplay slowdowns wasn't caused 
>> by font-lock, and thus the removal of locking will not regress those 
>> performance improvements.
>>
> 
> That is correct.
> 
>>
>> And for those (potential?) cases where font-lock is a real problem for 
>> performance, we could stop it from widening using an existing knob.
>>
> 
> That is not correct.  There is no knob that can prevent a mode from 
> widening.

Just the existing convention which implores modes not to do that.

CC Mode will continue to do what it does, I guess.
This bug report was last modified 2 years and 8 days ago.

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