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

Previous Next

Full log

Message #1333 received at 56682 <at> debbugs.gnu.org (full text, mbox):

From: Dmitry Gutov <dgutov <at> yandex.ru>
To: Eli Zaretskii <eliz <at> gnu.org>, Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: 56682 <at> debbugs.gnu.org, gregory <at> heytings.org
Subject: Re: bug#56682: Fix the long lines font locking related slowdowns
Date: Sat, 13 Aug 2022 19:48:41 +0300

On 13.08.2022 09:13, Eli Zaretskii wrote:
>>> I can only repeat that the only ways to improve font locking in a non-local
>>> way (or at least, the only ways that were identified in the discussions so
>>> far) are either to improve the speed of syntax-ppss by an order of
>>> magnitude, in which case it would perhaps become feasible to allow
>>> syntax-ppss to have access to the whole buffer, or to equip syntax-ppss with
>>> heuristics to make it work "as well as possible" even when it only has
>>> access to a portion of the buffer.
>> But the locked narrowing is applied based on the presence of long-lines
>> rather than based on the total size of the buffer.
> That's true, but the two are closely related: a buffer with very long
> lines tends also to be a large buffer.
> 

The long-line related problems start to become noticeable much earlier 
than the buffer becomes "large".

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.