From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Gregory Heytings Newsgroups: gmane.emacs.bugs Subject: bug#56682: Fix the long lines font locking related slowdowns Date: Fri, 05 Aug 2022 13:41:11 +0000 Message-ID: <92da07bd02941d5537e9@heytings.org> References: <8c7321f2f3400a5db9be@heytings.org> <8c7321f2f388e5343475@heytings.org> <8c7321f2f36494299e61@heytings.org> <8c7321f2f336523624e3@heytings.org> <83r1202meh.fsf@gnu.org> <6020ffaf-9069-0070-76cf-a13379ef01b5@yandex.ru> <83les71ilg.fsf@gnu.org> <06c5560d-3009-e5a5-3d33-fe5d2ec32d6b@yandex.ru> <74ddc877f17a06d8f120@heytings.org> <100d08b3-c25b-683f-6def-39052107ab59@yandex.ru> <83h72r16g1.fsf@gnu.org> <640c2e07-98e1-96d6-bb02-19f5f03f637f@yandex.ru> <834jyq29o1.fsf@gnu.org> <92da07bd028e3ede61a6@heytings.org> <47894c57-dd8b-5778-240a-3fa6540e4d37@yandex.ru> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="30517"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 56682@debbugs.gnu.org, Eli Zaretskii , Stefan Monnier To: Dmitry Gutov Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Fri Aug 05 15:42:54 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 1oJxbJ-0007lc-7x for geb-bug-gnu-emacs@m.gmane-mx.org; Fri, 05 Aug 2022 15:42:53 +0200 Original-Received: from localhost ([::1]:34246 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oJxbI-0003E4-8l for geb-bug-gnu-emacs@m.gmane-mx.org; Fri, 05 Aug 2022 09:42:52 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:37958) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oJxaV-0001nV-8y for bug-gnu-emacs@gnu.org; Fri, 05 Aug 2022 09:42:03 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:38756) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1oJxaU-0005Bs-K9 for bug-gnu-emacs@gnu.org; Fri, 05 Aug 2022 09:42:03 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1oJxaU-00025m-D2 for bug-gnu-emacs@gnu.org; Fri, 05 Aug 2022 09:42:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Gregory Heytings Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Fri, 05 Aug 2022 13:42:02 +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=B56682.16597068787975 (code B ref 56682); Fri, 05 Aug 2022 13:42:02 +0000 Original-Received: (at 56682) by debbugs.gnu.org; 5 Aug 2022 13:41:18 +0000 Original-Received: from localhost ([127.0.0.1]:56738 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oJxZm-00024X-HX for submit@debbugs.gnu.org; Fri, 05 Aug 2022 09:41:18 -0400 Original-Received: from heytings.org ([95.142.160.155]:40510) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oJxZh-00024L-5o for 56682@debbugs.gnu.org; Fri, 05 Aug 2022 09:41:17 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=heytings.org; s=20220101; t=1659706871; bh=FVBlCVZDO/NOiP5Xl3y3SHoM6PFUK1hJb565RnMhEPY=; h=Date:From:To:cc:Subject:In-Reply-To:Message-ID:References:From; b=quQsBEaEMiN+gmkU5dBlEH9OxUyOEVYk2w9RvqLRFzSdYT1Z5m9yZx/p1N9x1dusB Q8WWRaKYxbcXz8Bl9rIKLZKtu8Y7/QH/PVNynyk2p89ZD+SB3Y1nvngFy67+6qGDUo K3Pbr3NpnqmzkzeO9h/MhlR7pOjm2g4ruGlyUGP60i0bNbWgOGGWHZlXYyH/bsHZoZ 40nsueQqyTdXemKZFJ9304b1rbsYsOIaGyJgLi8E2+yfxAqhq9MANh0RHTiSEljimj cav9AfCqWNJCcEV99uonTkLW3p7iU9xBkDnFqGkwsKU4cWmrh44NQQPMp3n4APtvBA 7/fssSXkRAyEg== In-Reply-To: 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:238914 Archived-At: >> What I'm not sure of is how useful is a "font-lock with arbitrary >> narrowing", where portions will be highlighted as strings rather than >> code (and vice-versa). I don't have enough experience with it yet to >> be sure. Taking a step back, I suspect that the only "real" solution >> is something like `jit-lock-defer` coupled with a way to perform the >> font-lock (and syntax-ppss/propertize) in the background. > > IIRC I heard that "some other editors" take the approach of restricting > syntax-highlighting to just the beginning of a large file. > Other editors just give up syntax highlighting altogether even with the 18 MB file (and you cannot edit really large files with them). But if you're so annoyed by mis-fontification, why don't you just turn font-lock mode off? Also, why did you not protest vehemently when Stefan added syntax-wholeline-max, which also causes occasional mis-fontification?