From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: Emacs and Gnome Canvas Date: Thu, 15 Jul 2010 18:20:55 +0300 Message-ID: <83tyo0g4a0.fsf@gnu.org> References: <4C3CD120.4040905@swipnet.se> <5A91499A-0470-43FD-9F48-560CEAD3424C@mit.edu> <83wrsyr068.fsf@gnu.org> <83iq4hhjww.fsf@gnu.org> <87sk3lbvv0.fsf@telefonica.net> <83hbk1grnq.fsf@gnu.org> <4C3EBCDC.8050709@swipnet.se> <83d3upgmwj.fsf@gnu.org> <4C3ECB4C.6050208@swipnet.se> <83aaptgly1.fsf@gnu.org> <4C3ED4F9.4080603@swipnet.se> <83630hgi0r.fsf@gnu.org> <4C3EE8D6.3020607@swipnet.se> <8339vlgcax.fsf@gnu.org> <4C3F1A1B.1040106@swipnet.se> <83wrswg6e4.fsf@gnu.org> <4C3F264F.2030501@swipnet.se> Reply-To: Eli Zaretskii NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE X-Trace: dough.gmane.org 1279207408 10998 80.91.229.12 (15 Jul 2010 15:23:28 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Thu, 15 Jul 2010 15:23:28 +0000 (UTC) Cc: ofv@wanadoo.es, emacs-devel@gnu.org To: =?UTF-8?B?SmFuIERqw6Rydg==?= Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Thu Jul 15 17:23:26 2010 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 4.69) (envelope-from ) id 1OZQHT-0001hS-Uw for ged-emacs-devel@m.gmane.org; Thu, 15 Jul 2010 17:23:24 +0200 Original-Received: from localhost ([127.0.0.1]:51747 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OZQHT-0001HB-LA for ged-emacs-devel@m.gmane.org; Thu, 15 Jul 2010 11:23:23 -0400 Original-Received: from [140.186.70.92] (port=36680 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OZQHF-0001EP-Ep for emacs-devel@gnu.org; Thu, 15 Jul 2010 11:23:14 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1OZQH9-0004So-Tr for emacs-devel@gnu.org; Thu, 15 Jul 2010 11:23:09 -0400 Original-Received: from mtaout22.012.net.il ([80.179.55.172]:53539) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1OZQH9-0004SY-Ia for emacs-devel@gnu.org; Thu, 15 Jul 2010 11:23:03 -0400 Original-Received: from conversion-daemon.a-mtaout22.012.net.il by a-mtaout22.012.net.il (HyperSendmail v2007.08) id <0L5L00C00UPDIH00@a-mtaout22.012.net.il> for emacs-devel@gnu.org; Thu, 15 Jul 2010 18:22:51 +0300 (IDT) Original-Received: from HOME-C4E4A596F7 ([77.127.120.144]) by a-mtaout22.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0L5L009DGUQ2Z480@a-mtaout22.012.net.il>; Thu, 15 Jul 2010 18:22:51 +0300 (IDT) In-reply-to: <4C3F264F.2030501@swipnet.se> X-012-Sender: halo1@inter.net.il X-detected-operating-system: by eggs.gnu.org: Solaris 10 (beta) 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:127359 Archived-At: > Date: Thu, 15 Jul 2010 17:16:31 +0200 > From: Jan Dj=C3=A4rv > CC: ofv@wanadoo.es, emacs-devel@gnu.org >=20 > 2010-07-15 16:35, Eli Zaretskii skrev: > >> Date: Thu, 15 Jul 2010 16:24:27 +0200 > >> From: Jan Dj=C3=A4rv > >> Cc: ofv@wanadoo.es, emacs-devel@gnu.org > >> > >> No, they need to be done anyway sometime, it is no waste. If th= e text isn't > >> displayed, the attributes are nvertheless set up correctly for t= he time when > >> the text is to be displayed later (by scrolling for example). > > > > By which time those attributes could have recomputed many times, = for > > just one display! > > >=20 > That may be so. But there is nothing actually displayed, you just = do a update=20 > of the attributes. This "just" is the hottest bottleneck of the current display engine. That's why we try so hard to avoid it. > I'm sure one could hook in to the scroll bars and just update the > visible portion if that is needed. I don't think updating the scroll bar is an important CPU user in today's redisplay. > >> If done right, I don't think it would be slower. But someone ha= s to do the > >> code before we know. > > > > Well, naturally, if "done right"s definition is "to be no slower"= ;-) > > >=20 > Isn't that always implied by "right"? Of course.