GNU bug report logs - #15876
24.3.50; Highly degraded performance between rev 114715 and 115006

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Package: emacs;

Reported by: "Sebastien Vauban" <sva-news <at> mygooglest.com>

Date: Tue, 12 Nov 2013 15:34:02 UTC

Severity: normal

Merged with 24565, 24918

Found in versions 24.3.50, 25.1

Done: Eli Zaretskii <eliz <at> gnu.org>

Bug is archived. No further changes may be made.

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From: Dmitry Antipov <dmantipov <at> yandex.ru>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: sva-news <at> mygooglest.com, 15876 <at> debbugs.gnu.org
Subject: bug#15876: 24.3.50; Highly degraded performance between rev 114715 and 115006
Date: Wed, 11 Dec 2013 22:00:48 +0400

On 12/11/2013 08:28 PM, Eli Zaretskii wrote:

> Right, this matches my observations.  Did you succeed in finding which
> function in this call sequence is the performance bottleneck?

Usually this is font_driver->list (xfont_list, w32font_list, etc), which
can create a lot of font-entity objects.

> Anyway, what about the patch below?  With it, the problem disappears
> even without your "threshold" based GC.

Looks good. But can we assume that FACE_FROM_ID (...) is always non-NULL?
Some important routines, like mark_face_cache, do not rely on this.

Dmitry
This bug report was last modified 8 years and 168 days ago.

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