From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Chong Yidong Newsgroups: gmane.emacs.devel Subject: Re: Low redisplay performance (23 regression) Date: Wed, 22 Apr 2009 12:28:31 -0400 Message-ID: <87bpqoejps.fsf@cyd.mit.edu> 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> <0D2D1B0B-A80D-4618-A6D7-34A897A54EE6@gmail.com> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1240417616 31158 80.91.229.12 (22 Apr 2009 16:26:56 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 22 Apr 2009 16:26:56 +0000 (UTC) Cc: Daniel Clemente , emacs-devel@gnu.org To: David Reitter Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Wed Apr 22 18:28:15 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 1LwfJ0-0003Y6-V4 for ged-emacs-devel@m.gmane.org; Wed, 22 Apr 2009 18:28:15 +0200 Original-Received: from localhost ([127.0.0.1]:39915 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1LwfHb-0006fu-Or for ged-emacs-devel@m.gmane.org; Wed, 22 Apr 2009 12:26:47 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1LwfHX-0006fF-2r for emacs-devel@gnu.org; Wed, 22 Apr 2009 12:26:43 -0400 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1LwfHR-0006et-N7 for emacs-devel@gnu.org; Wed, 22 Apr 2009 12:26:41 -0400 Original-Received: from [199.232.76.173] (port=44315 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1LwfHR-0006eq-Gv for emacs-devel@gnu.org; Wed, 22 Apr 2009 12:26:37 -0400 Original-Received: from cyd.mit.edu ([18.115.2.24]:39283) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1LwfHR-0002ZF-8s for emacs-devel@gnu.org; Wed, 22 Apr 2009 12:26:37 -0400 Original-Received: by cyd.mit.edu (Postfix, from userid 1000) id A4C2657E246; Wed, 22 Apr 2009 12:28:31 -0400 (EDT) In-Reply-To: <0D2D1B0B-A80D-4618-A6D7-34A897A54EE6@gmail.com> (David Reitter's message of "Wed, 22 Apr 2009 11:50:52 -0400") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.0.91 (gnu/linux) X-detected-operating-system: by monty-python.gnu.org: Genre and OS details not recognized. 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:110411 Archived-At: David Reitter writes: > I can corroborate these observations (subjectively FWIW) with > different modes such as SLIME and on NS (on OS X). So I don't think > it's anything system-related (drivers, X, etc). > > Note that if I run tabbar, but just set header-line-format to > something simpler (without all those faces), then I get a substantial > speedup. So, the slowdown may be related to displaying multiple faces? I have not experienced anything like this, myself. If you do M-x list-faces-display and scroll through that buffer, is there a slowdown? It's possible that tabbar is doing something with its face computation that is much more expensive on Emacs 23 than on Emacs 22; I don't have time to look at its code, however.