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

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Message #1576 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: Fix the long lines font locking related slowdowns
Date: Tue, 16 Aug 2022 00:15:43 +0300

On 15.08.2022 23:53, Gregory Heytings wrote:
>>
>> I said those words just as I was working on improving font-lock's 
>> performance in JSON files. An effort which doesn't make sense if you 
>> narrow around font-lock anyway.
>>
>> Also note that until now it has been impossible to improve redisplay 
>> of big files by working on font-lock (other bottlenecks were much more 
>> significant).
>>
> 
> Wrong.  The (much more common) case of big files _without_ long lines, 
> in which the same font locking slowdowns already exist, has AFAICS not 
> been a sufficient incentive to improve font locking.

Okay, you're right about that.

There have been many more complaints about being unable to edit a file 
with a 5000+ line comfortably, than about editing 100+ MB files.

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