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

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Message #433 received at 56682 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: 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: Sun, 31 Jul 2022 10:48:28 +0300

> From: Stefan Monnier <monnier <at> iro.umontreal.ca>
> Cc: Eli Zaretskii <eliz <at> gnu.org>,  56682 <at> debbugs.gnu.org
> Date: Sun, 31 Jul 2022 03:25:46 -0400
> 
> How 'bout we do the reverse then: set the narrowing, but let-bind
> a variable to indicate that we're inside a line-length-induced
> narrowing, together with the previous narrowing bounds, so jit-lock or
> its clients can undo the narrowing when needed?

I'd rather prefer an extension of 'widen' that would be able to undo
the locked narrowing "when needed".  That way, jit-lock clients should
actually do something to request that, instead of letting them keep
the current code that widens whenever they feel like it.

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