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: Sun, 31 Jul 2022 18:47:14 -0400 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> 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="12251"; 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 Mon Aug 01 00:48:25 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 1oIHjV-0002xo-35 for geb-bug-gnu-emacs@m.gmane-mx.org; Mon, 01 Aug 2022 00:48:25 +0200 Original-Received: from localhost ([::1]:60380 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oIHjT-0008I7-U7 for geb-bug-gnu-emacs@m.gmane-mx.org; Sun, 31 Jul 2022 18:48:23 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:35630) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oIHj8-0008Hy-Qx for bug-gnu-emacs@gnu.org; Sun, 31 Jul 2022 18:48:02 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:49033) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1oIHj8-00034T-I8 for bug-gnu-emacs@gnu.org; Sun, 31 Jul 2022 18:48:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1oIHj8-0007yV-Dg for bug-gnu-emacs@gnu.org; Sun, 31 Jul 2022 18:48:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Stefan Monnier Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 31 Jul 2022 22:48:02 +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=B56682.165930764630502 (code B ref 56682); Sun, 31 Jul 2022 22:48:02 +0000 Original-Received: (at 56682) by debbugs.gnu.org; 31 Jul 2022 22:47:26 +0000 Original-Received: from localhost ([127.0.0.1]:38782 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oIHiY-0007vu-5o for submit@debbugs.gnu.org; Sun, 31 Jul 2022 18:47:26 -0400 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:26338) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oIHiV-0007vd-Mf for 56682@debbugs.gnu.org; Sun, 31 Jul 2022 18:47:24 -0400 Original-Received: from pmg1.iro.umontreal.ca (localhost.localdomain [127.0.0.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id 693C31003BF; Sun, 31 Jul 2022 18:47:18 -0400 (EDT) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id 40BC5100169; Sun, 31 Jul 2022 18:47:17 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1659307637; bh=uDNgNwH7IgAHyCAPZv8NbFnGDmVE+vEx9sFipZ35cak=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=KrRS5C/fIGFiZ6hA9b/32TJlVSQkfBw4H1h0Xug2YPZO6Z+Xk8YZ8F7OsKlBswtK8 ULsL8tLkinA5rHOO2t+dN4vPWYKu8MItEO+eCeh8REMpDKBENg72gTRPYDego08nDo nbUHmChBZx1geiRpGJJLcOj/UFo32JAx6Hl8mmgy7Fn/kkqaiX2m/+2meWjnhtm9Oa J3r5blzcNAipWPduRw+eSOs8m895GYSbR51zUxm+qjkThvIUcO9LUmNNqXlV87nVDr Aev0VQ6U0QuFw7lBEOag0DnZMKAvQKECdiVHOD9tPFtx8tfvUIG9tv2Hg9gd2wDWr0 DYpFdvKPGPU/w== Original-Received: from milanesa (dyn.144-85-174-155.dsl.vtx.ch [144.85.174.155]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id 4E4501202A8; Sun, 31 Jul 2022 18:47:16 -0400 (EDT) In-Reply-To: <8c7321f2f3ac52bfee4b@heytings.org> (Gregory Heytings's message of "Sun, 31 Jul 2022 22:23:19 +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:238374 Archived-At: > That's true, but with such big files, the initial scan is slow. So the > scenario is simple: you open a big enough file, type M->, and C-p. M-> will > be instantaneous, and C-p will take a while, because of syntax-ppss. Really? I'd expect that `M->` is slow because of `syntax-ppss` (called by font-lock) and then `C-p` is instantaneous. Stefan