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#21453: 25.0.50; When font size is temporarily increased Emacs is slow Date: Thu, 10 Sep 2015 18:41:25 +0300 Message-ID: <838u8e5lju.fsf@gnu.org> References: <87wpvymwbl.fsf@openmailbox.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8BIT X-Trace: ger.gmane.org 1441899875 30132 80.91.229.3 (10 Sep 2015 15:44:35 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 10 Sep 2015 15:44:35 +0000 (UTC) Cc: 21453@debbugs.gnu.org To: Mark Karpov Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Thu Sep 10 17:44:16 2015 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 1Za41H-0000dT-C8 for geb-bug-gnu-emacs@m.gmane.org; Thu, 10 Sep 2015 17:44:15 +0200 Original-Received: from localhost ([::1]:49943 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Za41G-0003HS-UM for geb-bug-gnu-emacs@m.gmane.org; Thu, 10 Sep 2015 11:44:14 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:52630) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Za3zB-0000vY-QZ for bug-gnu-emacs@gnu.org; Thu, 10 Sep 2015 11:42:06 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Za3z8-0000GX-FH for bug-gnu-emacs@gnu.org; Thu, 10 Sep 2015 11:42:05 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:34885) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Za3z8-0000GT-CV for bug-gnu-emacs@gnu.org; Thu, 10 Sep 2015 11:42:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1Za3z8-0005Af-5w for bug-gnu-emacs@gnu.org; Thu, 10 Sep 2015 11:42:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 10 Sep 2015 15:42:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 21453 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 21453-submit@debbugs.gnu.org id=B21453.144189969819843 (code B ref 21453); Thu, 10 Sep 2015 15:42:02 +0000 Original-Received: (at 21453) by debbugs.gnu.org; 10 Sep 2015 15:41:38 +0000 Original-Received: from localhost ([127.0.0.1]:55328 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Za3yk-00059x-Al for submit@debbugs.gnu.org; Thu, 10 Sep 2015 11:41:38 -0400 Original-Received: from mtaout22.012.net.il ([80.179.55.172]:60799) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Za3yi-00059p-Cu for 21453@debbugs.gnu.org; Thu, 10 Sep 2015 11:41:37 -0400 Original-Received: from conversion-daemon.a-mtaout22.012.net.il by a-mtaout22.012.net.il (HyperSendmail v2007.08) id <0NUG00700WW56N00@a-mtaout22.012.net.il> for 21453@debbugs.gnu.org; Thu, 10 Sep 2015 18:41:35 +0300 (IDT) Original-Received: from HOME-C4E4A596F7 ([84.94.185.246]) by a-mtaout22.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0NUG006OJWXASH80@a-mtaout22.012.net.il>; Thu, 10 Sep 2015 18:41:35 +0300 (IDT) In-reply-to: <87wpvymwbl.fsf@openmailbox.org> 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: 208.118.235.43 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:106349 Archived-At: > From: Mark Karpov > Date: Thu, 10 Sep 2015 15:56:46 +0600 > > When I press ‘C-x C-=’ to temporarily increase font size Emacs is > getting considerably slower. For example, if I hold ‘C-n’ to move > several lines down the movement is not smooth. I don't think that > increasing of font size should normally result in such “effects”. I cannot reproduce this in "emacs -Q" with today's master. Do you have any customizations related to scrolling? This further input from you: > Also, when point reaches edge of screen Emacs instantly shows you next > portion of text so point gets in the middle of the screen, instead of > just showing you one more line. ^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ seems to indicate that you have customized scrolling, because by default Emacs does not scroll just one line. Perhaps you have scroll-conservatively set to a large value; if so, I'd indeed expect some slowdown when the font size is changed, because supporting scroll-conservatively is sometimes costly, especially when the last displayed line is only partially visible. So please try this in "emacs -Q" first. Thanks.