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: Mon, 01 Aug 2022 13:14:20 +0000 Message-ID: References: <837d46mjen.fsf@gnu.org> <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> <83tu6w2mrm.fsf@gnu.org> <83les82jz1.fsf@gnu.org> 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="30497"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 56682@debbugs.gnu.org, monnier@iro.umontreal.ca, dgutov@yandex.ru To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Mon Aug 01 15:35:01 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 1oIVZV-0007gd-Ib for geb-bug-gnu-emacs@m.gmane-mx.org; Mon, 01 Aug 2022 15:35:01 +0200 Original-Received: from localhost ([::1]:51480 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oIVZU-0005yA-K4 for geb-bug-gnu-emacs@m.gmane-mx.org; Mon, 01 Aug 2022 09:35:00 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:57240) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oIVGB-0003X7-7T for bug-gnu-emacs@gnu.org; Mon, 01 Aug 2022 09:15:03 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:49960) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1oIVGA-0007iO-Sd for bug-gnu-emacs@gnu.org; Mon, 01 Aug 2022 09:15:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1oIVGA-000369-GR for bug-gnu-emacs@gnu.org; Mon, 01 Aug 2022 09:15:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Gregory Heytings Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 01 Aug 2022 13:15:02 +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=B56682.165935966411825 (code B ref 56682); Mon, 01 Aug 2022 13:15:02 +0000 Original-Received: (at 56682) by debbugs.gnu.org; 1 Aug 2022 13:14:24 +0000 Original-Received: from localhost ([127.0.0.1]:39706 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oIVFY-00034f-Bt for submit@debbugs.gnu.org; Mon, 01 Aug 2022 09:14:24 -0400 Original-Received: from heytings.org ([95.142.160.155]:33822) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oIVFW-00034U-HV for 56682@debbugs.gnu.org; Mon, 01 Aug 2022 09:14:23 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=heytings.org; s=20220101; t=1659359661; bh=IldMMgO7WTrZZ09PXgCyruPN7DiDjBBt+sQIq2UR8nA=; h=Date:From:To:cc:Subject:In-Reply-To:Message-ID:References:From; b=t/6/Wu1IFlJjt1kzEKAxCZS0O3hzN5VUTL9mZ5k90+/ZPriCTxiRYn4spRvntW7Rc v5ErEHsM07DABQDCjDo1RWOtXL/I8ARheQLkW0qFOQvEjeaoIxBbwNV3lH3TsX/YGi 2A3dTIs5nBMwlpS5QXIovn4EXawBERR0ac6WXBhPojARcz45jG+Tdpwjk6y1u8mEUd cUGE21N8gborQNuYKUmnwTy8sNiBwD6gyIsfVqco17iFkqb4WXMA62HOFExyJIqtW2 on414d9sCoCz3ZKXi01hADhTy2Ns0SXO0Y3bUBxaciweUAxYBc4OyvjgcE/s6nE+Qr tId8DBA56FfKw== In-Reply-To: <83les82jz1.fsf@gnu.org> 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:238434 Archived-At: >> It is, indeed. But here we are talking about big files (say 1 GB). >> In that case (and in that case only) it is much better, from a user >> viewpoint, to wait say 20 seconds before the file is opened and being >> at that point able to freely move through the file, instead of waiting >> only 6 seconds, and then having to wait another 10 seconds between two >> motion commands like M-> C-p. In fact, no user expects that a 1 GB >> file would open instantaneously. > > You can maybe have that for C-p that follows M->, but wouldn't the wait > return, with a vengeance, if you insert a single character (because then > the buffer needs to be re-scanned)? If so, we've gained nothing, > really. > Fortunately no: the buffer doesn't need to be rescanned, syntax-ppss caches its result, to avoid having to rescan the whole buffer again and again. At least that's what Stefan and Dmitry told me, and that's what I see in my tests.