From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Alan Mackenzie Newsgroups: gmane.emacs.bugs Subject: bug#23476: Slowdown in C Mode fontification [Was: bug#23476: 25.0.93; Visiting C files on master signals an error] Date: Tue, 10 May 2016 07:51:32 +0000 Message-ID: <20160510075132.GA1923@acm.fritz.box> References: <83mvo1enoe.fsf@gnu.org> <20160507185225.GB3660@acm.fritz.box> <83lh3lelw1.fsf@gnu.org> <83k2j5ekdc.fsf@gnu.org> <20160507204022.GE3660@acm.fritz.box> <83inyoeek8.fsf@gnu.org> <20160509110713.GA5316@acm.fritz.box> <83shxrcgxz.fsf@gnu.org> <20160509182206.GC5316@acm.fritz.box> <83eg9bcai5.fsf@gnu.org> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1462866742 9582 80.91.229.3 (10 May 2016 07:52:22 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 10 May 2016 07:52:22 +0000 (UTC) Cc: 23476@debbugs.gnu.org To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Tue May 10 09:52:11 2016 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 1b02Sg-0006pT-Dw for geb-bug-gnu-emacs@m.gmane.org; Tue, 10 May 2016 09:52:10 +0200 Original-Received: from localhost ([::1]:44964 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b02Sf-0002Sx-Kd for geb-bug-gnu-emacs@m.gmane.org; Tue, 10 May 2016 03:52:09 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:39941) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b02Sc-0002R1-NE for bug-gnu-emacs@gnu.org; Tue, 10 May 2016 03:52:07 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1b02SY-0001wG-Jz for bug-gnu-emacs@gnu.org; Tue, 10 May 2016 03:52:06 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:32775) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b02SY-0001w6-GU for bug-gnu-emacs@gnu.org; Tue, 10 May 2016 03:52:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1b02SY-0003DW-7u for bug-gnu-emacs@gnu.org; Tue, 10 May 2016 03:52:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Alan Mackenzie Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 10 May 2016 07:52:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 23476 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 23476-submit@debbugs.gnu.org id=B23476.146286669812335 (code B ref 23476); Tue, 10 May 2016 07:52:02 +0000 Original-Received: (at 23476) by debbugs.gnu.org; 10 May 2016 07:51:38 +0000 Original-Received: from localhost ([127.0.0.1]:45112 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1b02SA-0003Cs-7Q for submit@debbugs.gnu.org; Tue, 10 May 2016 03:51:38 -0400 Original-Received: from mail.muc.de ([193.149.48.3]:20301) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1b02S8-0003Ck-Jm for 23476@debbugs.gnu.org; Tue, 10 May 2016 03:51:37 -0400 Original-Received: (qmail 31959 invoked by uid 3782); 10 May 2016 07:51:34 -0000 Original-Received: from acm.muc.de (p548C6597.dip0.t-ipconnect.de [84.140.101.151]) by colin.muc.de (tmda-ofmipd) with ESMTP; Tue, 10 May 2016 09:51:33 +0200 Original-Received: (qmail 3597 invoked by uid 1000); 10 May 2016 07:51:32 -0000 Content-Disposition: inline In-Reply-To: <83eg9bcai5.fsf@gnu.org> User-Agent: Mutt/1.5.24 (2015-08-30) X-Delivery-Agent: TMDA/1.1.12 (Macallan) X-Primary-Address: acm@muc.de 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:118055 Archived-At: Hello, Eli. On Mon, May 09, 2016 at 10:11:14PM +0300, Eli Zaretskii wrote: [ .... ] > Btw, I noticed that CC Mode is quite a bit slower on master than it is > on emacs-25 (try searching for "IF_LINT" in xdisp.c), is that related > to these changes in any way? Whoops! No, this slowdown is caused by commit 89d1776b81ab552192ee41f13ce84ff86bda4556 on 2016-04-25, a fix for bug #7918. The bug was the spurious fontification of something like "for (; a * b;)". I'll see if I can find a better fix; if not, it would probably be best to remove the commit and leave the bug unfixed. -- Alan Mackenzie (Nuremberg, Germany).