From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Ihor Radchenko Newsgroups: gmane.emacs.bugs Subject: bug#58558: 29.0.50; re-search-forward is slow in some buffers Date: Tue, 13 Dec 2022 13:32:13 +0000 Message-ID: <87wn6vbfaa.fsf@localhost> References: <877d10r21x.fsf@localhost> <87zgdwyvkt.fsf@gnus.org> <87ilkk6ri5.fsf@localhost> <87v8okjei9.fsf@gnus.org> <87tu44jdce.fsf@localhost> <87czasjd9j.fsf@gnus.org> <87k050nio5.fsf@localhost> <87zgdwhw0z.fsf@gnus.org> <83sfjo3tfw.fsf@gnu.org> <878rlfjmjh.fsf@localhost> <87mt9tbbbp.fsf@gnus.org> <8335bl18lo.fsf@gnu.org> <87wn8x9eqb.fsf@gnus.org> <87tu1zd2c6.fsf@localhost> <83h6xzphxm.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="31941"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 58558@debbugs.gnu.org, larsi@gnus.org, monnier@iro.umontreal.ca To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Tue Dec 13 14:33:30 2022 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1p55PV-00083t-Vi for geb-bug-gnu-emacs@m.gmane-mx.org; Tue, 13 Dec 2022 14:33:30 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1p55PF-0000LJ-A4; Tue, 13 Dec 2022 08:33:13 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1p55P9-0000Ko-1M for bug-gnu-emacs@gnu.org; Tue, 13 Dec 2022 08:33:09 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1p55P4-0002Qy-Js for bug-gnu-emacs@gnu.org; Tue, 13 Dec 2022 08:33:03 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1p55P4-0003h3-F6 for bug-gnu-emacs@gnu.org; Tue, 13 Dec 2022 08:33:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Ihor Radchenko Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 13 Dec 2022 13:33:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 58558 X-GNU-PR-Package: emacs Original-Received: via spool by 58558-submit@debbugs.gnu.org id=B58558.167093834714186 (code B ref 58558); Tue, 13 Dec 2022 13:33:02 +0000 Original-Received: (at 58558) by debbugs.gnu.org; 13 Dec 2022 13:32:27 +0000 Original-Received: from localhost ([127.0.0.1]:60414 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1p55OU-0003gk-Jf for submit@debbugs.gnu.org; Tue, 13 Dec 2022 08:32:26 -0500 Original-Received: from mout01.posteo.de ([185.67.36.65]:33529) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1p55OT-0003gd-38 for 58558@debbugs.gnu.org; Tue, 13 Dec 2022 08:32:25 -0500 Original-Received: from submission (posteo.de [185.67.36.169]) by mout01.posteo.de (Postfix) with ESMTPS id D864C240027 for <58558@debbugs.gnu.org>; Tue, 13 Dec 2022 14:32:16 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.net; s=2017; t=1670938338; bh=bT0/97tsQRd2FtcWFFn62dP+mG3cxGDdWH2lHfFDJ8E=; h=From:To:Cc:Subject:Date:From; b=SFHOFOLAxGTWgeAhGVPmNrYX/MzyluBv/A1efJYmMstwTZl/20eVppNSQ5AAz3O/J F4IBSwyd42Y3Edtl3NHj8sm1i0WBKbn4S1LqaUyPhCh0izFpgzCDB4eisyXmPCzD/2 4HMvZR7Fmxsoz5Vn8ykjA3G1M1s44Dgizp/0kZ/ZAQwxmJNyKhtWWFEqoO+IhBUkzH 6xvtA2vB1dJ5PoKKuM46WvDhEZPPg3VLsWYewLqxaV22pLlo63lZzkC2uWHrkMRTEu NuKfBWYiQ9HjKmYtRhaejhVqt5Rz0mQA+TdQmgpPBO0F2snxEybnn5+AjcXIF7pZe+ GMkNNmwNJkZSQ== Original-Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4NWfYW1WJDz6tmJ; Tue, 13 Dec 2022 14:32:15 +0100 (CET) In-Reply-To: <83h6xzphxm.fsf@gnu.org> X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list 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-mx.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.bugs:250835 Archived-At: Eli Zaretskii writes: >> The fraction of buf_bytepos_to_charpos increases over repeated benchmark >> runs. > > So buf_bytepos_to_charpos is the main suspect now, I guess. This > could happen because either (a) buf_bytepos_to_charpos is called more > times as session uptime progresses, Just to clarify. The perf records I did are roughly for the duration of benchmark-run calls. Nothing more. > or (b) because each call to > buf_bytepos_to_charpos becomes more and more expensive. So I think > the first question is: how many times is buf_bytepos_to_charpos called > for each search, or, equivalently, is the CPU time per call used up by > buf_bytepos_to_charpos stays stable or goes up? I think perf can > answer these questions if you ask nicely. I will look how to do it. Maybe perf probe. I guess, it will be useful to compile Emacs with debug symbols at this point. > Is the buffer in question being edited as time advances? Or is buffer > text and everything else in the buffer left unchanged? Not edited between benchmarks. Remember that I did sequence of benchmark-run calls and the time gradually increases. -- Ihor Radchenko // yantar92, Org mode contributor, Learn more about Org mode at . Support Org development at , or support my work at