From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#26051: 25.1; overlays may make emacs very slow Date: Sun, 12 Mar 2017 17:47:47 +0200 Message-ID: <83fuiicx98.fsf@gnu.org> References: <871su3nua2.fsf@gmail.com> Reply-To: Eli Zaretskii NNTP-Posting-Host: blaine.gmane.org X-Trace: blaine.gmane.org 1489333754 12895 195.159.176.226 (12 Mar 2017 15:49:14 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sun, 12 Mar 2017 15:49:14 +0000 (UTC) Cc: 26051@debbugs.gnu.org To: ynyaaa@gmail.com Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sun Mar 12 16:49:10 2017 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cn5k3-0002Vh-Fn for geb-bug-gnu-emacs@m.gmane.org; Sun, 12 Mar 2017 16:49:07 +0100 Original-Received: from localhost ([::1]:47395 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cn5k7-0004MP-JS for geb-bug-gnu-emacs@m.gmane.org; Sun, 12 Mar 2017 11:49:11 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:54412) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cn5k1-0004MK-Ij for bug-gnu-emacs@gnu.org; Sun, 12 Mar 2017 11:49:06 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cn5jy-0003XH-Fp for bug-gnu-emacs@gnu.org; Sun, 12 Mar 2017 11:49:05 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:54582) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1cn5jy-0003X9-CZ for bug-gnu-emacs@gnu.org; Sun, 12 Mar 2017 11:49:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1cn5jy-0006iC-3U for bug-gnu-emacs@gnu.org; Sun, 12 Mar 2017 11:49:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 12 Mar 2017 15:49:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 26051 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 26051-submit@debbugs.gnu.org id=B26051.148933369225743 (code B ref 26051); Sun, 12 Mar 2017 15:49:02 +0000 Original-Received: (at 26051) by debbugs.gnu.org; 12 Mar 2017 15:48:12 +0000 Original-Received: from localhost ([127.0.0.1]:52781 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cn5jA-0006h9-HN for submit@debbugs.gnu.org; Sun, 12 Mar 2017 11:48:12 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:34801) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cn5j8-0006gw-9Q for 26051@debbugs.gnu.org; Sun, 12 Mar 2017 11:48:10 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cn5iz-00032M-Uh for 26051@debbugs.gnu.org; Sun, 12 Mar 2017 11:48:05 -0400 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:60551) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cn5iz-00032I-Qp; Sun, 12 Mar 2017 11:48:01 -0400 Original-Received: from 84.94.185.246.cable.012.net.il ([84.94.185.246]:2594 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1cn5iz-00010W-0e; Sun, 12 Mar 2017 11:48:01 -0400 In-reply-to: <871su3nua2.fsf@gmail.com> (ynyaaa@gmail.com) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] 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" Xref: news.gmane.org gmane.emacs.bugs:130518 Archived-At: > From: ynyaaa@gmail.com > Cc: 26051@debbugs.gnu.org > Date: Sun, 12 Mar 2017 10:44:21 +0900 > > >> "@%d\n" > >> "?%d\n" > >> "\u00E1%d\n" ;; LATIN SMALL LETTER A WITH ACUTE > >> "\u3042%d\n" ;; HIRAGANA LETTER A > >> "\u4E00%d\n" ;; CJK IDEOGRAPH-4E00 > >> "\uFF41%d\n" ;; FULLWIDTH LATIN SMALL LETTER A > > > > What I see here, with all of the above except the first two, is that > > what takes a long time is for the code to run; once I see "Done" in > > the echo area, redisplay takes less than a second. > > Why is it take long time to use multibyte characters? > 2 seconds and 2 minutes are very different. My guess is because we need to compute the byte position of the markers that store the overlay's beginning and end. But that's just a guess. Btw, your original recipe will produce a much faster redisplay if you set bidi-paragraph-direction of the buffer to left-to-right, instead of leaving it at its default nil value. Sorry I didn't mention this earlier.