From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Chong Yidong Newsgroups: gmane.emacs.bugs Subject: bug#5734: 23.1.94; (forward-sexp N) at the very end of large latex-mode buffer takes time proportional to N Date: Thu, 25 Mar 2010 15:17:12 -0400 Message-ID: <8739zoi53b.fsf@stupidchicken.com> References: NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: dough.gmane.org 1269550322 3084 80.91.229.12 (25 Mar 2010 20:52:02 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Thu, 25 Mar 2010 20:52:02 +0000 (UTC) Cc: 5734@debbugs.gnu.org To: joaotavora@gmail.com (Joao Tavora) Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Thu Mar 25 21:51:57 2010 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1Nuu20-0006zd-MD for geb-bug-gnu-emacs@m.gmane.org; Thu, 25 Mar 2010 21:51:57 +0100 Original-Received: from localhost ([127.0.0.1]:45174 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Nuu20-0003Wx-84 for geb-bug-gnu-emacs@m.gmane.org; Thu, 25 Mar 2010 16:51:56 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1NusgH-0006wx-VN for bug-gnu-emacs@gnu.org; Thu, 25 Mar 2010 15:25:26 -0400 Original-Received: from [140.186.70.92] (port=43219 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1NusgG-0006w1-DU for bug-gnu-emacs@gnu.org; Thu, 25 Mar 2010 15:25:25 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1NusgD-000774-Gl for bug-gnu-emacs@gnu.org; Thu, 25 Mar 2010 15:25:24 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:47546) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1NusgD-00076x-E1 for bug-gnu-emacs@gnu.org; Thu, 25 Mar 2010 15:25:21 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.69) (envelope-from ) id 1NusZ8-0005Lj-Ie; Thu, 25 Mar 2010 15:18:02 -0400 X-Loop: bug-gnu-emacs@gnu.org In-Reply-To: Resent-From: Chong Yidong Original-Sender: debbugs-submit-bounces@debbugs.gnu.org Resent-To: owner@debbugs.gnu.org Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 25 Mar 2010 19:18:02 +0000 Resent-Message-ID: Resent-Sender: bug-gnu-emacs@gnu.org X-GNU-PR-Message: followup 5734 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 5734-submit@debbugs.gnu.org id=B5734.126954463920553 (code B ref 5734); Thu, 25 Mar 2010 19:18:02 +0000 Original-Received: (at 5734) by debbugs.gnu.org; 25 Mar 2010 19:17:19 +0000 Original-Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1NusYR-0005LS-A1 for submit@debbugs.gnu.org; Thu, 25 Mar 2010 15:17:19 -0400 Original-Received: from pantheon-po33.its.yale.edu ([130.132.50.94]) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1NusYO-0005LN-VS for 5734@debbugs.gnu.org; Thu, 25 Mar 2010 15:17:17 -0400 Original-Received: from furry (dhcp128036014175.central.yale.edu [128.36.14.175]) (authenticated bits=0) by pantheon-po33.its.yale.edu (8.12.11.20060308/8.12.11) with ESMTP id o2PJHCOq013889 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT); Thu, 25 Mar 2010 15:17:12 -0400 Original-Received: by furry (Postfix, from userid 1000) id A9865C011; Thu, 25 Mar 2010 15:17:12 -0400 (EDT) X-YaleITSMailFilter: Version 1.2c (attachment(s) not renamed) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list Resent-Date: Thu, 25 Mar 2010 15:18:02 -0400 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) 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: , Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:35756 Archived-At: > start with `emacs -Q' > M-x eval-expression RET (insert (make-string 100000 ?a)) RET > M-x eval-expression RET (latex-mode) RET > M-x eval-expression RET (forward-sexp 200) RET > M-x eval-expression RET (forward-sexp 500) RET > M-x eval-expression RET (forward-sexp (point-max)) RET > In some versions of emacs this does not happen, notably my earlier > Carbon Emacs "GNU Emacs 22.3.1 (i386-apple-darwin9.7.0, Carbon Version > 1.6.0) of 2009-07-26 on gs674-seijiz.local" after loading some lisp > libraries (don't know which), like the ones I have bellow (autopair, > yasnippet). I can reproduce this slowness even on Emacs 22.3. It arises because tex-mode wants to be able to signal an error if point is in a containing expression that ends prematurely, so it does a bit of backtracking. (This is the `skip-syntax-backward' call in latex-forward-sexp-1). I'm not sure what the best way to fix this is, though.