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: Tue, 02 Aug 2022 17:51:41 -0400 Message-ID: References: <8a3eaeef01be5bfaa5ef@heytings.org> <05388e8d8812bfa3695d@heytings.org> <83v8rf5894.fsf@gnu.org> <65cb7c73fd4a999cca00@heytings.org> <8c7321f2f3400a5db9be@heytings.org> <8c7321f2f388e5343475@heytings.org> <6ea376f6-d503-06d8-6d83-50c52b695394@yandex.ru> <8c7321f2f3ac52bfee4b@heytings.org> <2f7eeea3-6ba9-d2c2-1fb9-dd40d2de2002@yandex.ru> <8c7321f2f368e8dd096d@heytings.org> <56a688f6-6c93-8b67-895c-2c41f563fc93@yandex.ru> <83sfmg2mkv.fsf@gnu.org> <17c0d4df-78f5-76f4-784d-5c9d52eb7fa0@yandex.ru> <83bkt27rij.fsf@gnu.org> <668375bf-a861-04da-f78d-04b6719e0dd4@yandex.ru> <74ddc877f142634d29c2@heytings.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="28536"; 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, Eli Zaretskii , Dmitry Gutov To: Gregory Heytings Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Tue Aug 02 23:52:09 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 1oIzo8-0007CM-SE for geb-bug-gnu-emacs@m.gmane-mx.org; Tue, 02 Aug 2022 23:52:08 +0200 Original-Received: from localhost ([::1]:37236 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oIzo7-00079w-PX for geb-bug-gnu-emacs@m.gmane-mx.org; Tue, 02 Aug 2022 17:52:07 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:45948) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oIzo2-00079i-4T for bug-gnu-emacs@gnu.org; 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Tue, 2 Aug 2022 17:51:46 -0400 (EDT) In-Reply-To: <74ddc877f142634d29c2@heytings.org> (Gregory Heytings's message of "Tue, 02 Aug 2022 15:06:17 +0000") 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:238592 Archived-At: > And even if one sets font-lock-dont-widen to nil, mode authors are > completely free to ignore that setting (assuming they're aware it exists). Hmm... `font-lock-dont-widen` is not about telling the major modes's font-lock code to refrain from narrowing. It's there so a major mode (like mmm-mode) can tell font-lock.el to refrain from widening. The major-mode's own font-lock rules should never need to widen (because font-lock itself does it, normally). If they do, it's a bug. Stefan