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

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Message #140 received at 15876 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Dmitry Antipov <dmantipov <at> yandex.ru>, Kenichi Handa <handa <at> gnu.org>,
 Jan Djärv <jan.h.d <at> swipnet.se>
Cc: sva-news <at> mygooglest.com, 15876 <at> debbugs.gnu.org
Subject: Re: bug#15876: 24.3.50;
 Highly degraded performance between rev 114715 and 115006
Date: Wed, 11 Dec 2013 20:12:08 +0200

> Date: Wed, 11 Dec 2013 22:00:48 +0400
> From: Dmitry Antipov <dmantipov <at> yandex.ru>
> CC: 15876 <at> debbugs.gnu.org, sva-news <at> mygooglest.com
> 
> > 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.

I think you are right, and we should make sure it's non-NULL before
dereferencing.

Jan, Ken'ichi, would you please comment on this?  Are we losing
something by reusing already loaded fonts that support a given
character, as opposed to looking for the "best-match" font?

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