From: Chong Yidong <cyd@stupidchicken.com>
To: Jason Rumney <jasonr@gnu.org>
Cc: emacs-devel@gnu.org
Subject: Re: Analysis of redisplay performance on Windows
Date: Sun, 27 Jul 2008 21:18:28 -0400 [thread overview]
Message-ID: <8763qqiz6j.fsf@stupidchicken.com> (raw)
In-Reply-To: <488CEE6B.6020600@gnu.org> (Jason Rumney's message of "Sun, 27 Jul 2008 22:53:47 +0100")
Jason Rumney <jasonr@gnu.org> writes:
> One difference between Emacs 22 and 23 is that we compute glyph
> indexes properly in Emacs 23, while on 22 we use unicode code
> points. Since we call font->encode_char once per character rather than
> for a whole run, the overhead of selecting fonts into the GC is
> multiplied. As I suggested in my earlier email, new functions in the
> font backend interface to select a font for working with and releasing
> it when done, would help, as we could then skip doing this in
> functions like encode_char and text_extents.
Could you suggest precisely what interface we need? I.e., could you
suggest function names and rought docstrings?
next prev parent reply other threads:[~2008-07-28 1:18 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-27 3:07 Analysis of redisplay performance on Windows Chong Yidong
2008-07-27 9:55 ` Jason Rumney
2008-07-27 20:56 ` Chong Yidong
2008-07-27 21:30 ` Jason Rumney
2008-07-27 21:40 ` Chong Yidong
2008-07-27 21:53 ` Jason Rumney
2008-07-28 1:18 ` Chong Yidong [this message]
2008-07-28 3:06 ` Adrian Robert
2008-07-28 5:03 ` Chong Yidong
2008-07-28 7:04 ` Jason Rumney
2008-07-28 2:11 ` Kevin Yu
2008-07-28 4:24 ` YAMAMOTO Mitsuharu
2008-07-28 9:48 ` YAMAMOTO Mitsuharu
2008-07-30 21:51 ` Jason Rumney
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