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

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Message #1117 received at 56682 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Gregory Heytings <gregory <at> heytings.org>
Cc: gerd.moellmann <at> gmail.com, 56682 <at> debbugs.gnu.org, monnier <at> iro.umontreal.ca,
 dgutov <at> yandex.ru
Subject: Re: bug#56682: Fix the long lines font locking related slowdowns
Date: Sat, 06 Aug 2022 17:05:21 +0300

> Date: Fri, 05 Aug 2022 11:50:56 +0000
> From: Gregory Heytings <gregory <at> heytings.org>
> cc: gerd.moellmann <at> gmail.com, 56682 <at> debbugs.gnu.org, monnier <at> iro.umontreal.ca, 
>     dgutov <at> yandex.ru
> 
> Indeed, that seems to be the culprit here, I didn't know that text-mode 
> was an exception here.  If I set bidi-paragraph-direction to 
> 'left-to-right after visiting the arabic-small.txt file, Emacs (mis) 
> behaves like it does for the other Arabic files: it becomes slow, and C-n 
> C-p do not work correctly anymore.

I've installed a change that makes Arabic rendering roughly twice
faster.  It is still quite slow, but less so.

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