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

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From: Gregory Heytings <gregory <at> heytings.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: gerd.moellmann <at> gmail.com, 56682 <at> debbugs.gnu.org, monnier <at> iro.umontreal.ca, dgutov <at> yandex.ru
Subject: bug#56682: Fix the long lines font locking related slowdowns
Date: Thu, 04 Aug 2022 09:24:00 +0000

>
> Gregory, is there a reason why the long-lines-improvements branch is not 
> yet merged?  I think it already includes important improvements that 
> should be exposed to a larger population for testing and feedback.
>

I was planning to add more improvements, but indeed merging that one and 
creating yet another one seems better at this point.

I just pushed an improvement for Bidi.  I did not do so earlier because I 
was trying to improve it further, but somehow I'm hitting a brick wall 
here.  Could you please check, and tell me if what I already did is okay?

In this case I did not find a good test case in the wild (or more 
precisely, I had no idea how to find one), so I concoted one myself. 
You'll find it here: https://www.heytings.org/data/locales.json .  Emacs 
is still a bit sluggish with that file, but behaves much better than 
before.

>
> If you for some reason prefer to keep that branch active, can you please 
> merge the current master to it, so that the changes in narrow-to-region 
> will be on the branch?
>

Is that feasible?  Non fast forwards are not allowed in the Emacs 
repository, so rebasing a feature branch is not possible (without using 
the workaround of deleting and recreating the branch).

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