From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: YAMAMOTO Mitsuharu Newsgroups: gmane.emacs.devel Subject: Re: Low redisplay performance (23 regression) Date: Thu, 23 Apr 2009 07:58:56 +0900 Organization: Faculty of Science, Chiba University Message-ID: References: <4870CC42-A08E-4BE9-B566-0F4DA7AB0B74@gmail.com> <873ac3arbf.fsf@cyd.mit.edu> <83r5zmhf2q.fsf@gnu.org> <83mya9hm0i.fsf@gnu.org> <873ac0aeoy.fsf@CPU107.opentrends.net> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 (generated by SEMI 1.14.6 - "Maruoka") Content-Type: text/plain; charset=US-ASCII X-Trace: ger.gmane.org 1240441166 15848 80.91.229.12 (22 Apr 2009 22:59:26 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 22 Apr 2009 22:59:26 +0000 (UTC) Cc: emacs-devel@gnu.org To: Daniel Clemente Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Thu Apr 23 01:00:45 2009 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1LwlQo-0005HL-Qo for ged-emacs-devel@m.gmane.org; Thu, 23 Apr 2009 01:00:43 +0200 Original-Received: from localhost ([127.0.0.1]:41325 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1LwlPP-0002YS-Rs for ged-emacs-devel@m.gmane.org; Wed, 22 Apr 2009 18:59:15 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1LwlPJ-0002YH-Iv for emacs-devel@gnu.org; Wed, 22 Apr 2009 18:59:09 -0400 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1LwlPD-0002XV-QF for emacs-devel@gnu.org; Wed, 22 Apr 2009 18:59:08 -0400 Original-Received: from [199.232.76.173] (port=32914 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1LwlPD-0002XE-Kx for emacs-devel@gnu.org; Wed, 22 Apr 2009 18:59:03 -0400 Original-Received: from ntp.math.s.chiba-u.ac.jp ([133.82.132.2]:56894 helo=mathmail.math.s.chiba-u.ac.jp) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1LwlPD-0008J3-2X for emacs-devel@gnu.org; Wed, 22 Apr 2009 18:59:03 -0400 Original-Received: from church.math.s.chiba-u.ac.jp (church [133.82.132.36]) by mathmail.math.s.chiba-u.ac.jp (Postfix) with ESMTP id ED98D2C40; Thu, 23 Apr 2009 07:58:56 +0900 (JST) In-Reply-To: <873ac0aeoy.fsf@CPU107.opentrends.net> User-Agent: Wanderlust/2.14.0 (Africa) SEMI/1.14.6 (Maruoka) FLIM/1.14.8 (=?ISO-8859-4?Q?Shij=F2?=) APEL/10.6 Emacs/22.3 (sparc-sun-solaris2.8) MULE/5.0 (SAKAKI) X-detected-operating-system: by monty-python.gnu.org: NetBSD 3.0 (DF) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:110414 Archived-At: >>>>> On Wed, 22 Apr 2009 17:30:37 +0200, Daniel Clemente 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 mituharu@math.s.chiba-u.ac.jp