From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#12463: 24.2; pos-visible-in-window-p gets slower over time Date: Tue, 18 Sep 2012 19:24:10 +0300 Message-ID: <834nmv1eqd.fsf@gnu.org> References: <87wqzs1a4c.fsf@queen.i-did-not-set--mail-host-address--so-tickle-me> <83mx0n22p0.fsf@gnu.org> <5511358.p8J1TLefsG@queen> <87k3vrnzgh.fsf@fastmail.fm> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1347985493 23032 80.91.229.3 (18 Sep 2012 16:24:53 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 18 Sep 2012 16:24:53 +0000 (UTC) Cc: jwalt@garni.ch, 12463@debbugs.gnu.org To: Matt Lundin Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Tue Sep 18 18:24:54 2012 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1TE0bU-0005FN-GF for geb-bug-gnu-emacs@m.gmane.org; Tue, 18 Sep 2012 18:24:52 +0200 Original-Received: from localhost ([::1]:33943 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TE0bQ-0002Od-1w for geb-bug-gnu-emacs@m.gmane.org; Tue, 18 Sep 2012 12:24:48 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:51957) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TE0bN-0002OL-DW for bug-gnu-emacs@gnu.org; Tue, 18 Sep 2012 12:24:46 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TE0bJ-0005um-6v for bug-gnu-emacs@gnu.org; Tue, 18 Sep 2012 12:24:45 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:60734) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TE0bJ-0005uh-41 for bug-gnu-emacs@gnu.org; Tue, 18 Sep 2012 12:24:41 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.72) (envelope-from ) id 1TE0cb-0005mB-J1 for bug-gnu-emacs@gnu.org; Tue, 18 Sep 2012 12:26:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: debbugs-submit-bounces@debbugs.gnu.org Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 18 Sep 2012 16:26:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 12463 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 12463-submit@debbugs.gnu.org id=B12463.134798553422111 (code B ref 12463); Tue, 18 Sep 2012 16:26:01 +0000 Original-Received: (at 12463) by debbugs.gnu.org; 18 Sep 2012 16:25:34 +0000 Original-Received: from localhost ([127.0.0.1]:42038 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.72) (envelope-from ) id 1TE0c9-0005kU-UR for submit@debbugs.gnu.org; Tue, 18 Sep 2012 12:25:34 -0400 Original-Received: from mtaout21.012.net.il ([80.179.55.169]:59897) by debbugs.gnu.org with esmtp (Exim 4.72) (envelope-from ) id 1TE0c6-0005k9-IE for 12463@debbugs.gnu.org; Tue, 18 Sep 2012 12:25:31 -0400 Original-Received: from conversion-daemon.a-mtaout21.012.net.il by a-mtaout21.012.net.il (HyperSendmail v2007.08) id <0MAK00900042RK00@a-mtaout21.012.net.il> for 12463@debbugs.gnu.org; Tue, 18 Sep 2012 19:24:01 +0300 (IDT) Original-Received: from HOME-C4E4A596F7 ([87.69.4.28]) by a-mtaout21.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0MAK009W6081QD30@a-mtaout21.012.net.il>; Tue, 18 Sep 2012 19:24:01 +0300 (IDT) In-reply-to: <87k3vrnzgh.fsf@fastmail.fm> X-012-Sender: halo1@inter.net.il X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.13 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 2) X-Received-From: 140.186.70.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:64559 Archived-At: > From: Matt Lundin > Date: Tue, 18 Sep 2012 10:05:34 -0500 > Cc: 12463@debbugs.gnu.org > > AFAICT, the bottleneck seems to be in the emacs xft rendering. I tested > this by opening two frames showing the same outline buffer. One of the > frames was a X frame using xft fonts; another frame was running in a > console (urxvt, which also uses xft rendering but shows no similar > slowdown). When opening an outline entry containing multibyte > characters, it appeared instantly in the console frame but only after a > substantial lag on the X frame. > > In other words, the culprit may be something other than > pos-visible-in-window-p. pos-visible-in-window-p invokes many functions involved in redisplay, including the font shaper, it just arranges things so that nothing is output to the glass. So anything that slows down font shaping will also slow down pos-visible-in-window-p. However, in this case it looks like image drawing is the culprit, not font shaping.