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#16594: 24.3.50; very slow redraw when resizing windows horizontally Date: Fri, 31 Jan 2014 10:22:06 +0200 Message-ID: <83d2j87e8h.fsf@gnu.org> References: <52EA57F6.70808@gmx.at> <83iot177ug.fsf@gnu.org> <83k3dh6x84.fsf@gnu.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1391156588 17888 80.91.229.3 (31 Jan 2014 08:23:08 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 31 Jan 2014 08:23:08 +0000 (UTC) Cc: 16594@debbugs.gnu.org To: Darren Hoo Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Fri Jan 31 09:23:15 2014 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 1W99Nb-0005m0-G0 for geb-bug-gnu-emacs@m.gmane.org; Fri, 31 Jan 2014 09:23:15 +0100 Original-Received: from localhost ([::1]:53720 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1W99Na-0007xU-Ra for geb-bug-gnu-emacs@m.gmane.org; Fri, 31 Jan 2014 03:23:14 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:56627) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1W99NT-0007xB-Jx for bug-gnu-emacs@gnu.org; Fri, 31 Jan 2014 03:23:12 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1W99NO-0000kV-Po for bug-gnu-emacs@gnu.org; Fri, 31 Jan 2014 03:23:07 -0500 Original-Received: from debbugs.gnu.org ([140.186.70.43]:56540) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1W99NO-0000kR-MC for bug-gnu-emacs@gnu.org; Fri, 31 Jan 2014 03:23:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1W99NO-0003v3-3F for bug-gnu-emacs@gnu.org; Fri, 31 Jan 2014 03:23:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Fri, 31 Jan 2014 08:23:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 16594 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 16594-submit@debbugs.gnu.org id=B16594.139115652714989 (code B ref 16594); Fri, 31 Jan 2014 08:23:01 +0000 Original-Received: (at 16594) by debbugs.gnu.org; 31 Jan 2014 08:22:07 +0000 Original-Received: from localhost ([127.0.0.1]:42326 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1W99MU-0003tg-Hx for submit@debbugs.gnu.org; Fri, 31 Jan 2014 03:22:07 -0500 Original-Received: from mtaout25.012.net.il ([80.179.55.181]:48462) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1W99MR-0003tJ-Pd for 16594@debbugs.gnu.org; Fri, 31 Jan 2014 03:22:05 -0500 Original-Received: from conversion-daemon.mtaout25.012.net.il by mtaout25.012.net.il (HyperSendmail v2007.08) id <0N0900D00B73FO00@mtaout25.012.net.il> for 16594@debbugs.gnu.org; Fri, 31 Jan 2014 10:21:32 +0200 (IST) Original-Received: from HOME-C4E4A596F7 ([87.69.4.28]) by mtaout25.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0N090046XB7WKK90@mtaout25.012.net.il>; Fri, 31 Jan 2014 10:21:32 +0200 (IST) In-reply-to: X-012-Sender: halo1@inter.net.il X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x 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:84334 Archived-At: > From: Darren Hoo > Cc: 16594@debbugs.gnu.org > Date: Fri, 31 Jan 2014 11:16:47 +0800 > > Eli Zaretskii writes: > > >> From: Darren Hoo > >> Cc: Stefan Monnier , 16594@debbugs.gnu.org > >> Date: Fri, 31 Jan 2014 02:57:58 +0800 > >> > >> In case I have not described my problem precise enough, maybe this > >> screencast I take will clear things up a bit: > >> > >> http://blog.glib.cc/resize.html > > > > I see nothing of the kind on my system. Moreover, what you show > > doesn't look like an Emacs redisplay problem, but rather like some > > low-level redraw problem. > > indeed, it seems that this redisplay_internal is problematic: No, it's read-char and x_write_glyphs. The latter calls the X server. Of the total 345 ms, 130 ms are used by read-char and another 154 ms by x_write_glyphs and x_clear_end_of_line, together these two take 284 ms, or 82% of the time. The rest is distributed among the following functions that are part of the display engine: redisplay_internal 18 ms update_window 36 ms update_window_line 14 ms Given that dragging the divider involves redrawing every line in every window, these times are entirely reasonable, and seem to confirm my suspicions that the problem is on the X level.