From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#56682: Fix the long lines font locking related slowdowns Date: Sat, 06 Aug 2022 17:05:21 +0300 Message-ID: <83y1w1xyam.fsf@gnu.org> References: <83pmhuft5a.fsf@gnu.org> <05388e8d8836c2e7ef3e@heytings.org> <136c4fe0fcb9ce5181cb@heytings.org> <3d639ea12689d767ba2a@heytings.org> <838ro44fc8.fsf@gnu.org> <3d639ea126d759bddfea@heytings.org> <83y1w42vp4.fsf@gnu.org> <3d639ea12618e6a503af@heytings.org> <83wnbo2uw3.fsf@gnu.org> <3d639ea126e3a4d880b8@heytings.org> <83k07o2izh.fsf@gnu.org> <3d639ea1265c40a07f40@heytings.org> <83h72s2e3o.fsf@gnu.org> <3d639ea126c6b0c6737b@heytings.org> <838ro42b1g.fsf@gnu.org> <3d639ea126db3913202e@heytings.org> <83wnbn264f.fsf@gnu.org> <3d639ea12684115449f8@heytings.org> <83tu6r1b03.fsf@gnu.org> <92da07bd02b96d54dbf4@heytings.org> <835yj62a18.fsf@gnu.org> <92da07bd02f5963a2da4@heytings.org> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="38296"; mail-complaints-to="usenet@ciao.gmane.io" Cc: gerd.moellmann@gmail.com, 56682@debbugs.gnu.org, monnier@iro.umontreal.ca, dgutov@yandex.ru To: Gregory Heytings Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Sat Aug 06 16:06:13 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 1oKKRR-0009mz-D9 for geb-bug-gnu-emacs@m.gmane-mx.org; Sat, 06 Aug 2022 16:06:13 +0200 Original-Received: from localhost ([::1]:37278 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oKKRP-0000Ak-Os for geb-bug-gnu-emacs@m.gmane-mx.org; Sat, 06 Aug 2022 10:06:11 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:38198) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oKKRG-0000Ac-Kc for bug-gnu-emacs@gnu.org; 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Original-Received: from [87.69.77.57] (port=2843 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oKKQn-0001s7-7L; Sat, 06 Aug 2022 10:05:33 -0400 In-Reply-To: <92da07bd02f5963a2da4@heytings.org> (message from Gregory Heytings on Fri, 05 Aug 2022 11:50:56 +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:238989 Archived-At: > Date: Fri, 05 Aug 2022 11:50:56 +0000 > From: Gregory Heytings > cc: gerd.moellmann@gmail.com, 56682@debbugs.gnu.org, monnier@iro.umontreal.ca, > dgutov@yandex.ru > > Indeed, that seems to be the culprit here, I didn't know that text-mode > was an exception here. If I set bidi-paragraph-direction to > 'left-to-right after visiting the arabic-small.txt file, Emacs (mis) > behaves like it does for the other Arabic files: it becomes slow, and C-n > C-p do not work correctly anymore. I've installed a change that makes Arabic rendering roughly twice faster. It is still quite slow, but less so.