From: Kenichi Handa <handa@m17n.org>
To: YAMAMOTO Mitsuharu <mituharu@math.s.chiba-u.ac.jp>
Cc: dcl441-bugs@yahoo.com, emacs-devel@gnu.org
Subject: ftx font driver [Re: Low redisplay performance (23 regression)]
Date: Thu, 23 Apr 2009 10:01:12 +0900 [thread overview]
Message-ID: <E1LwnJQ-0004UN-V5@etlken> (raw)
In-Reply-To: <wlzle8i9cf.wl%mituharu@math.s.chiba-u.ac.jp> (message from YAMAMOTO Mitsuharu on Thu, 23 Apr 2009 07:58:56 +0900)
In article <wlzle8i9cf.wl%mituharu@math.s.chiba-u.ac.jp>, YAMAMOTO Mitsuharu <mituharu@math.s.chiba-u.ac.jp> writes:
>>>>>> On Wed, 22 Apr 2009 17:30:37 +0200, Daniel Clemente <dcl441-bugs@yahoo.com> said:
> > I haven't compared Emacs 22 and 23, but from a subjective point of
> > view I have noticed that latest Emacs 23 feels slow and updates too
> > much for a modern computer. Some particular problems I noticed
> > randomly:
> Which font backend driver are you using? You can check it with (cdr
> (assq 'font-backend (frame-parameters))). I found the ftx font driver
> was much slower than the xft one partly because of repeated
> calculations of font metrics. (So I added some cache code to
> ftcrfont.c in my latest cairo patch posted here).
Please exlain why it calculates font metrics repeatedly.
As ftx font driver is not used by default on any platforms,
it is not tested well and I myself don't remember the code
well.
---
Kenichi Handa
handa@m17n.org
next prev parent reply other threads:[~2009-04-23 1:01 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-20 21:58 Low redisplay performance (23 regression) David Reitter
2009-04-20 22:31 ` Deniz Dogan
2009-04-20 22:33 ` Chong Yidong
2009-04-20 23:20 ` David Reitter
2009-04-21 3:15 ` Eli Zaretskii
2009-04-21 12:36 ` Juanma Barranquero
2009-04-21 13:51 ` David Reitter
2009-04-21 14:20 ` Juanma Barranquero
2009-04-21 18:58 ` Eli Zaretskii
2009-04-21 19:07 ` Eli Zaretskii
2009-04-21 23:24 ` Juanma Barranquero
2009-04-21 20:19 ` David Reitter
2009-04-21 20:53 ` Chong Yidong
2009-04-21 22:15 ` David Reitter
2009-04-22 15:30 ` Daniel Clemente
2009-04-22 15:50 ` David Reitter
2009-04-22 16:28 ` Chong Yidong
2009-04-22 18:26 ` David Reitter
2009-04-23 13:34 ` Willem Rein Oudshoorn
2009-04-23 22:45 ` Miles Bader
2009-05-06 13:28 ` Willem Rein Oudshoorn
2009-04-22 22:58 ` YAMAMOTO Mitsuharu
2009-04-23 1:01 ` Kenichi Handa [this message]
2009-04-23 7:31 ` ftx font driver [Re: Low redisplay performance (23 regression)] YAMAMOTO Mitsuharu
2009-04-23 11:22 ` Kenichi Handa
2009-04-23 12:38 ` Chong Yidong
2009-04-23 14:56 ` Stefan Monnier
2009-04-24 1:09 ` Kenichi Handa
2009-04-24 2:01 ` Stefan Monnier
2009-04-24 3:52 ` Chong Yidong
2009-04-25 14:38 ` Chong Yidong
2009-04-21 23:16 ` Low redisplay performance (23 regression) Juanma Barranquero
2009-04-21 14:56 ` William Xu
2009-04-21 15:30 ` David Reitter
2009-04-22 14:25 ` William Xu
2009-04-29 10:17 ` Tobias C. Rittweiler
2009-04-29 11:54 ` David Reitter
2009-04-29 13:33 ` Stefan Monnier
2009-04-29 17:35 ` Tobias C. Rittweiler
2009-04-29 20:20 ` Stefan Monnier
2009-04-30 7:34 ` Tobias C. Rittweiler
2009-04-30 20:00 ` Stefan Monnier
2009-04-30 20:34 ` Tobias C. Rittweiler
2009-04-29 18:01 ` Tobias C. Rittweiler
2009-04-29 17:40 ` Tassilo Horn
2009-04-29 17:49 ` David Reitter
2009-04-29 18:21 ` Tassilo Horn
[not found] ` <14FF0914-56BA-41D6-85DA-A4024694CF75@gmail.com>
2009-04-29 19:45 ` Tassilo Horn
2009-04-29 18:45 ` Chong Yidong
2009-04-30 2:46 ` YAMAMOTO Mitsuharu
2009-04-30 3:49 ` Chong Yidong
2009-04-30 6:27 ` YAMAMOTO Mitsuharu
2009-04-29 22:10 ` Miles Bader
2009-04-30 5:05 ` Chong Yidong
2009-04-30 7:53 ` Tobias C. Rittweiler
2009-04-30 9:37 ` Tassilo Horn
2009-04-30 12:44 ` David Reitter
2009-04-29 18:38 ` Dan Nicolaescu
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