GNU bug report logs - #15555
24.3; Bidirectional display very slow with long lines

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Package: emacs;

Reported by: Jerome L Quinn <jlquinn <at> us.ibm.com>

Date: Mon, 7 Oct 2013 20:25:01 UTC

Severity: normal

Merged with 3219, 4123, 9589, 13675, 18530, 22143, 24523, 30457, 32523, 40007

Found in versions 23.1, 24.2, 24.2.93, 24.3, 24.5, 26.0.91, 27.0.50, 28.0.50

Fixed in version 29.1

Done: Lars Ingebrigtsen <larsi <at> gnus.org>

Bug is archived. No further changes may be made.

Full log

Message #47 received at 15555 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Dmitry Antipov <dmantipov <at> yandex.ru>
Cc: 15555 <at> debbugs.gnu.org, monnier <at> iro.umontreal.ca
Subject: Re: bug#15555: Re: bug#15555: 24.3;
 Bidirectional display very slow with long lines
Date: Tue, 18 Feb 2014 18:24:54 +0200

> Date: Tue, 18 Feb 2014 18:31:22 +0400
> From: Dmitry Antipov <dmantipov <at> yandex.ru>
> Cc: 15555 <at> debbugs.gnu.org
> 
> Now I'm seeing the use case where each trivial cursor movement causes
> ~100 calls to bidi_shelve_cache, and each call copies ~1.5M of data.
> If there is a redisplay problem which makes this unavoidable without
> rewriting 1/2 of xdisp.c, then "broken by design" is the only thing
> I can say about all of that mess.

If you show me where these calls are made, I might be able to say
something intelligent about that.  And maybe we could even discuss the
issue and find some clever solution, if it exists.
This bug report was last modified 2 years and 305 days ago.

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