From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier via "Bug reports for GNU Emacs, the Swiss army knife of text editors" Newsgroups: gmane.emacs.bugs Subject: bug#56682: Fix the long lines font locking related slowdowns Date: Sat, 23 Jul 2022 10:07:29 -0400 Message-ID: References: <837d46mjen.fsf@gnu.org> <8335esjppt.fsf@gnu.org> Reply-To: Stefan Monnier Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="20816"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) Cc: 56682@debbugs.gnu.org, gregory@heytings.org To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Sat Jul 23 16:10:26 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 1oFFpp-0005F8-3V for geb-bug-gnu-emacs@m.gmane-mx.org; Sat, 23 Jul 2022 16:10:25 +0200 Original-Received: from localhost ([::1]:40392 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oFFpn-0005zV-VM for geb-bug-gnu-emacs@m.gmane-mx.org; Sat, 23 Jul 2022 10:10:23 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:38802) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oFFnW-0004P1-Dm for bug-gnu-emacs@gnu.org; Sat, 23 Jul 2022 10:08:02 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:56190) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1oFFnW-0005cx-5M for bug-gnu-emacs@gnu.org; Sat, 23 Jul 2022 10:08:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1oFFnV-0005R0-U5 for bug-gnu-emacs@gnu.org; Sat, 23 Jul 2022 10:08:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Stefan Monnier Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 23 Jul 2022 14:08:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 56682 X-GNU-PR-Package: emacs Original-Received: via spool by 56682-submit@debbugs.gnu.org id=B56682.165858526120851 (code B ref 56682); Sat, 23 Jul 2022 14:08:01 +0000 Original-Received: (at 56682) by debbugs.gnu.org; 23 Jul 2022 14:07:41 +0000 Original-Received: from localhost ([127.0.0.1]:45939 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oFFnA-0005QE-RU for submit@debbugs.gnu.org; Sat, 23 Jul 2022 10:07:41 -0400 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:6619) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oFFn7-0005Pu-Vy for 56682@debbugs.gnu.org; Sat, 23 Jul 2022 10:07:40 -0400 Original-Received: from pmg1.iro.umontreal.ca (localhost.localdomain [127.0.0.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id 271AD10027D; Sat, 23 Jul 2022 10:07:32 -0400 (EDT) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id C4E59100120; Sat, 23 Jul 2022 10:07:30 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1658585250; bh=ZxPkOsi4CTTTVhe+/G5uqo8sf2IRtfZRTBynnpwUoiA=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=Ly1Wdd7++lduLcDOgiqsSl9pwjBvhISbh87zT/KAcQI9Vspj3MnN5jgzljocqLEXp VD5bIaw9VOGGwIDco6j7w/aW5K37fzVCW5Vf5lG9vAJr//++KPrr+JK6/7t+YWTca5 XqrdE3B13b8bCqQtgtFclMSgWwVFJhBbdN1snDzNpeSdS4j9/HyoAOXv7SNiuvJnSN YVmGWdfuuA/IvUKzFx4nLUaUAOeRAPflBxthPtXBi7iY1hw6BgLaRiUF6QDFwlRWKJ GlJ6aMPxw2zcneFznONUeoZfatu0xqFyIuy8Tqv+TJ600YSbnf/ZRDRimoCQNu1McX nlrLS27fnASBg== Original-Received: from pastel (unknown [45.72.195.111]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id 7B53C12023C; Sat, 23 Jul 2022 10:07:30 -0400 (EDT) In-Reply-To: <8335esjppt.fsf@gnu.org> (Eli Zaretskii's message of "Sat, 23 Jul 2022 09:41:18 +0300") 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" Xref: news.gmane.io gmane.emacs.bugs:237745 Archived-At: >> From: Stefan Monnier >> Cc: Gregory Heytings , 56682@debbugs.gnu.org >> Date: Fri, 22 Jul 2022 19:25:47 -0400 >> >> For example, the behavior surprises me because I can't see why `M-x` >> should cause any font-locking at all in the `long-line.xml` file. > > Any command that enters the minibuffer causes a thorough redisplay of > the windows on that frame (because more than one window has to be > updated). What does that have to do with font-lock is a separate > question (but you are the best person to answer it). AFAIK if the buffer has not been modified (including things like changing `window-start` or `point`), then a redisplay will just not run jit-lock (and hence font-lock) at all, no matter how thorough. Stefan