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: [rudalics@gmx.at: Re: jit lock sit-for provokes redisplay provokes imenu] Date: Wed, 30 Aug 2006 20:29:12 -0400 Message-ID: <87u03tkasn.fsf@furball.mit.edu> References: <8764gcde3n.fsf@stupidchicken.com> <878xl754fy.fsf@furball.mit.edu> <44F5D914.3020604@gmx.at> NNTP-Posting-Host: main.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: sea.gmane.org 1156984188 19655 80.91.229.2 (31 Aug 2006 00:29:48 GMT) X-Complaints-To: usenet@sea.gmane.org NNTP-Posting-Date: Thu, 31 Aug 2006 00:29:48 +0000 (UTC) Cc: emacs-devel@gnu.org, rms@gnu.org, monnier@iro.umontreal.ca Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Thu Aug 31 02:29:46 2006 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by ciao.gmane.org with esmtp (Exim 4.43) id 1GIaR8-0001el-JS for ged-emacs-devel@m.gmane.org; Thu, 31 Aug 2006 02:29:39 +0200 Original-Received: from localhost ([127.0.0.1] helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1GIaR7-00020u-WB for ged-emacs-devel@m.gmane.org; Wed, 30 Aug 2006 20:29:38 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1GIaQu-0001zs-S4 for emacs-devel@gnu.org; Wed, 30 Aug 2006 20:29:24 -0400 Original-Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1GIaQt-0001zj-GV for emacs-devel@gnu.org; Wed, 30 Aug 2006 20:29:23 -0400 Original-Received: from [18.72.1.2] (helo=south-station-annex.mit.edu) by monty-python.gnu.org with esmtps (TLS-1.0:DHE_RSA_AES_256_CBC_SHA:32) (Exim 4.52) id 1GIaaO-0002hX-Uk; Wed, 30 Aug 2006 20:39:13 -0400 Original-Received: from grand-central-station.mit.edu (GRAND-CENTRAL-STATION.MIT.EDU [18.7.21.82]) by south-station-annex.mit.edu (8.13.6/8.9.2) with ESMTP id k7V0TKY5007885; Wed, 30 Aug 2006 20:29:20 -0400 (EDT) Original-Received: from outgoing-legacy.mit.edu (OUTGOING-LEGACY.MIT.EDU [18.7.22.104]) by grand-central-station.mit.edu (8.13.6/8.9.2) with ESMTP id k7V0TKZ7028519; Wed, 30 Aug 2006 20:29:20 -0400 (EDT) Original-Received: from furball.mit.edu (SYDNEYPACIFIC-THREE-SIXTY-FOUR.MIT.EDU [18.95.6.109]) ) by outgoing-legacy.mit.edu (8.13.6/8.12.4) with ESMTP id k7V0TCOF025019; Wed, 30 Aug 2006 20:29:12 -0400 (EDT) Original-Received: from cyd by furball.mit.edu with local (Exim 3.36 #1 (Debian)) id 1GIaQi-0002c3-00; Wed, 30 Aug 2006 20:29:12 -0400 Original-To: martin rudalics In-Reply-To: <44F5D914.3020604@gmx.at> (martin rudalics's message of "Wed, 30 Aug 2006 20:29:40 +0200") User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.0.50 (gnu/linux) X-Spam-Score: 1.75 X-Scanned-By: MIMEDefang 2.42 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:59138 Archived-At: martin rudalics writes: >> Stefan wrote: >> >> This only eliminates one particular source of unwanted updates. I don't >> think this code is worth the trouble. >> >> That cause of unwanted updates is the only one we know of. Nothing >> else is likely to change the buffer in the background. > > `jit-lock-fontify-now' during scrolling, searching, window resizing. > Not mentioning the plethora of "hidden buffer changes" in c-mode. AFAIU, those are much less problematic than the changes during stealth fontification. That's because stealth fontification takes place in a timer, while Emacs is idle, and makes a change every 0.5 seconds (by default).