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#31888: 27.0.50; Segmentation fault in replace-buffer-contents Date: Mon, 25 Jun 2018 17:54:16 +0300 Message-ID: <83muvisyqv.fsf@gnu.org> References: <39638875-4e85-85dc-1cfa-3bfb7321e6b0@zoho.com> <83602bq8hl.fsf@gnu.org> <83bmc1vjn8.fsf@gnu.org> <877emnm97t.fsf@gmail.com> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Trace: blaine.gmane.org 1529938393 8431 195.159.176.226 (25 Jun 2018 14:53:13 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Mon, 25 Jun 2018 14:53:13 +0000 (UTC) Cc: 31888@debbugs.gnu.org, k.michal@zoho.com To: =?UTF-8?Q?Jo=C3=A3o_?= =?UTF-8?Q?T=C3=A1vora?= Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Mon Jun 25 16:53:09 2018 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 1fXSrb-00025E-GO for geb-bug-gnu-emacs@m.gmane.org; Mon, 25 Jun 2018 16:53:08 +0200 Original-Received: from localhost ([::1]:47569 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fXSti-0003zE-R7 for geb-bug-gnu-emacs@m.gmane.org; Mon, 25 Jun 2018 10:55:18 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:33480) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fXStX-0003x1-AA for bug-gnu-emacs@gnu.org; Mon, 25 Jun 2018 10:55:08 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fXStS-0003j9-RU for bug-gnu-emacs@gnu.org; Mon, 25 Jun 2018 10:55:07 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:55393) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1fXStS-0003ih-OD for bug-gnu-emacs@gnu.org; Mon, 25 Jun 2018 10:55:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1fXStS-0004wm-Ht for bug-gnu-emacs@gnu.org; Mon, 25 Jun 2018 10:55:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 25 Jun 2018 14:55:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 31888 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 31888-submit@debbugs.gnu.org id=B31888.152993847918984 (code B ref 31888); Mon, 25 Jun 2018 14:55:02 +0000 Original-Received: (at 31888) by debbugs.gnu.org; 25 Jun 2018 14:54:39 +0000 Original-Received: from localhost ([127.0.0.1]:35057 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fXSt5-0004w8-Gd for submit@debbugs.gnu.org; Mon, 25 Jun 2018 10:54:39 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:42236) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fXSt3-0004vw-Qr for 31888@debbugs.gnu.org; Mon, 25 Jun 2018 10:54:38 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fXSsu-0003Y0-0M for 31888@debbugs.gnu.org; Mon, 25 Jun 2018 10:54:32 -0400 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:41408) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fXSsj-0003V6-Eo; Mon, 25 Jun 2018 10:54:17 -0400 Original-Received: from [176.228.60.248] (port=1948 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1fXSsi-0004v7-SJ; Mon, 25 Jun 2018 10:54:17 -0400 In-reply-to: <877emnm97t.fsf@gmail.com> (message from =?UTF-8?Q?Jo=C3=A3o_?= =?UTF-8?Q?T=C3=A1vora?= on Mon, 25 Jun 2018 11:49:58 +0100) 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:147811 Archived-At: > From: João Távora > Cc: eliz@gnu.org, k.michal@zoho.com > Date: Mon, 25 Jun 2018 11:49:58 +0100 > > I'm using this function in my Eglot package, but only because of its > ability to preserve markers, not text properties. And only one marker in > particular, the point marker. So I wonder if sth like a > replace-buffer-contents-no-properties could be added: according to your > analysis it could be significantly faster. I doubt that, because keeping markers needs the same technique: deletions interspersed with insertions, where both deletions and insertions are as small as possible. However, I'm working on profiling this command with better granularity, so maybe I will have additional ideas for speeding it up. (You should only see the slowness if there are a lot of small differences scattered all over the buffers. A few large differences close together should let the function's optimized algorithm to do a better job.)