From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#12867: 24.3.50; easy-to-repro crash involving mode line Date: Tue, 13 Nov 2012 14:52:54 +0200 Message-ID: <83sj8dvf4p.fsf@gnu.org> References: <77CAAFE4D0CE4DD98476C996E3158648@us.oracle.com> <83obj2x218.fsf@gnu.org> <50A13289.4050301@gmx.at> <83bof2wup6.fsf@gnu.org> <50A2033C.6070504@gmx.at> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1352811221 13189 80.91.229.3 (13 Nov 2012 12:53:41 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 13 Nov 2012 12:53:41 +0000 (UTC) Cc: 12867@debbugs.gnu.org To: martin rudalics Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Tue Nov 13 13:53:51 2012 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 1TYFzx-0006KR-My for geb-bug-gnu-emacs@m.gmane.org; Tue, 13 Nov 2012 13:53:49 +0100 Original-Received: from localhost ([::1]:36578 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TYFzn-0002tF-Ub for geb-bug-gnu-emacs@m.gmane.org; Tue, 13 Nov 2012 07:53:39 -0500 Original-Received: from eggs.gnu.org ([208.118.235.92]:32864) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TYFzj-0002sx-OG for bug-gnu-emacs@gnu.org; Tue, 13 Nov 2012 07:53:38 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TYFzg-0002Cl-Lo for bug-gnu-emacs@gnu.org; Tue, 13 Nov 2012 07:53:35 -0500 Original-Received: from debbugs.gnu.org ([140.186.70.43]:55826) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TYFzg-0002Cg-IS for bug-gnu-emacs@gnu.org; Tue, 13 Nov 2012 07:53:32 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.72) (envelope-from ) id 1TYG09-0004ua-IY for bug-gnu-emacs@gnu.org; Tue, 13 Nov 2012 07:54:01 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: debbugs-submit-bounces@debbugs.gnu.org Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 13 Nov 2012 12:54:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 12867 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 12867-submit@debbugs.gnu.org id=B12867.135281120018833 (code B ref 12867); Tue, 13 Nov 2012 12:54:01 +0000 Original-Received: (at 12867) by debbugs.gnu.org; 13 Nov 2012 12:53:20 +0000 Original-Received: from localhost ([127.0.0.1]:37844 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.72) (envelope-from ) id 1TYFzP-0004td-T3 for submit@debbugs.gnu.org; Tue, 13 Nov 2012 07:53:19 -0500 Original-Received: from mtaout22.012.net.il ([80.179.55.172]:45656) by debbugs.gnu.org with esmtp (Exim 4.72) (envelope-from ) id 1TYFzK-0004tR-MY for 12867@debbugs.gnu.org; Tue, 13 Nov 2012 07:53:14 -0500 Original-Received: from conversion-daemon.a-mtaout22.012.net.il by a-mtaout22.012.net.il (HyperSendmail v2007.08) id <0MDF00B00FPDVL00@a-mtaout22.012.net.il> for 12867@debbugs.gnu.org; Tue, 13 Nov 2012 14:52:37 +0200 (IST) Original-Received: from HOME-C4E4A596F7 ([87.69.4.28]) by a-mtaout22.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0MDF00AFMFRPZ7C0@a-mtaout22.012.net.il>; Tue, 13 Nov 2012 14:52:37 +0200 (IST) In-reply-to: <50A2033C.6070504@gmx.at> X-012-Sender: halo1@inter.net.il X-Spam-Score: 1.5 (+) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.13 Precedence: list X-Spam-Score: 1.5 (+) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-Received-From: 140.186.70.43 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-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:66859 Archived-At: > Date: Tue, 13 Nov 2012 09:22:20 +0100 > From: martin rudalics > CC: Eli Zaretskii , 12867@debbugs.gnu.org > > > FWIW, I recently added such a cache (in Elisp) to nlinum.el, and on my > > test case (largish file with C-v/M-v style scrolling) the difference was > > very significant (but the previous code had no cache at all, not even > > base_line_pos). > > So we now already have a syntax-ppss cache and a nlinum cache. Couldn't > we maintain one cache per buffer, updated by one and the same algorithm? These two cache different information, so making such a cache efficient is not very trivial. At least for nlinum, if it were to use some Lisp binding of find_next_newline_no_quit (there's no such binding at this time, but it wouldn't be hard to provide one), they could use a newline cache provided by region-cache.c for free.