GNU bug report logs - #51631
29.0.50; cc-mode fontification makes CPU at 100%

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Package: emacs;

Reported by: Zhiwei Chen <condy0919 <at> gmail.com>

Date: Sat, 6 Nov 2021 11:03:02 UTC

Severity: normal

Tags: confirmed, moreinfo

Merged with 51692

Found in version 29.0.50

Done: Alan Mackenzie <acm <at> muc.de>

Bug is archived. No further changes may be made.

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From: Zhiwei Chen <condy0919 <at> gmail.com>
To: Lars Ingebrigtsen <larsi <at> gnus.org>
Cc: 51631 <at> debbugs.gnu.org
Subject: bug#51631: 29.0.50; cc-mode fontification makes CPU at 100%
Date: Sun, 07 Nov 2021 09:55:12 +0800

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

> Zhiwei Chen <condy0919 <at> gmail.com> writes:
>
>> emacs -Q, then open the following c++ snippet.
>
> I put the snippet into a file /tmp/snippet.cc, and said:
>
> ./src/emacs -Q /tmp/snippet.cc 
>
> But I was unable to reproduce the problem -- the file displayed as
> normal for me, and Emacs didn't use 100% CPU.
>
> Are there any additional steps necessary to reproduce the problem?

Keeping pressing C-p/C-n will see the noticeable latency. To be
specific, C-p/C-n in the merge function makes Emacs unresponsive.

-- 
Zhiwei Chen
This bug report was last modified 3 years and 194 days ago.

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