GNU bug report logs - #4123
23.1.50; Using Emacs on files with very long lines makes it sluggish

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Package: emacs;

Reported by: Deniz Dogan <deniz.a.m.dogan <at> gmail.com>

Date: Tue, 11 Aug 2009 15:40:07 UTC

Severity: normal

Merged with 3219, 9589, 13675, 15555, 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.

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Message #25 received at control <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Jan Synacek <jsynacek <at> redhat.com>
Cc: 40007 <at> debbugs.gnu.org
Subject: Re: bug#40007: 28.0.50;
 Emacs gets very slow when displaying a long line
Date: Tue, 10 Mar 2020 16:40:12 +0200

merge 40007 13675
thanks

> From: Jan Synacek <jsynacek <at> redhat.com>
> Date: Tue, 10 Mar 2020 10:48:24 +0100
> 
> 
> 1) emacs -Q
> 2) M-x shell
> 3) execute a program that displays a single line, about ~193000
> characters long
> 
> I accidentaly wrote a scheme program that dumped an entire file as a
> single line, about 193k characters long, into the shell buffer. Emacs'
> reponse latency becomes *very* slow, especially when navigating the
> point over the long line.

This is bug#13675 (and others that were merged with it).

We now have so-long-mode to alleviate some of the problems.
This bug report was last modified 2 years and 298 days ago.

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