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Re: Low redisplay performance (23 regression)

From: YAMAMOTO Mitsuharu
Subject: Re: Low redisplay performance (23 regression)
Date: Thu, 23 Apr 2009 07:58:56 +0900
User-agent: Wanderlust/2.14.0 (Africa) SEMI/1.14.6 (Maruoka) FLIM/1.14.8 (Shij┼Ź) APEL/10.6 Emacs/22.3 (sparc-sun-solaris2.8) MULE/5.0 (SAKAKI)

>>>>> On Wed, 22 Apr 2009 17:30:37 +0200, Daniel Clemente <address@hidden> 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).

                                     YAMAMOTO Mitsuharu

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