From: Jason Rumney <jasonr@gnu.org>
To: YAMAMOTO Mitsuharu <mituharu@math.s.chiba-u.ac.jp>
Cc: Chong Yidong <cyd@stupidchicken.com>, emacs-devel@gnu.org
Subject: Re: Analysis of redisplay performance on Windows
Date: Wed, 30 Jul 2008 22:51:47 +0100 [thread overview]
Message-ID: <4890E273.7040001@gnu.org> (raw)
In-Reply-To: <wlod4iwd87.wl%mituharu@math.s.chiba-u.ac.jp>
YAMAMOTO Mitsuharu wrote:
>> According to the document below, Uniscribe seems to provide some
>> mechanism to defer heavy operations such as get_frame_dc and
>> SelectObject.
Yes, that seems to work if we switch to using uniscribe for encoding
characters. Since the gdi backend is only used for bitmap fonts and
older versions of Windows, I've switched off glyph indexing there for a
similar performance improvement. It hasn't had as bad an effect as I
expected with false positives when detecting support for a character.
prev parent reply other threads:[~2008-07-30 21:51 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
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 [this message]
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