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: Mon, 01 Aug 2022 07:06:21 -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> <8c7321f2f3ec1ef81af9@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="1953"; 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 13:07:15 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 1oITGT-0000H9-9i for geb-bug-gnu-emacs@m.gmane-mx.org; Mon, 01 Aug 2022 13:07:13 +0200 Original-Received: from localhost ([::1]:41260 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oITGR-0003o7-SA for geb-bug-gnu-emacs@m.gmane-mx.org; Mon, 01 Aug 2022 07:07:11 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:57958) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oITGI-0003mF-Tn for bug-gnu-emacs@gnu.org; Mon, 01 Aug 2022 07:07:02 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:49716) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1oITGI-0001SV-JW for bug-gnu-emacs@gnu.org; Mon, 01 Aug 2022 07:07:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1oITGI-0005mO-Cz for bug-gnu-emacs@gnu.org; Mon, 01 Aug 2022 07:07:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Stefan Monnier Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 01 Aug 2022 11:07:02 +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=B56682.165935199722182 (code B ref 56682); Mon, 01 Aug 2022 11:07:02 +0000 Original-Received: (at 56682) by debbugs.gnu.org; 1 Aug 2022 11:06:37 +0000 Original-Received: from localhost ([127.0.0.1]:39465 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oITFt-0005lh-Bi for submit@debbugs.gnu.org; Mon, 01 Aug 2022 07:06:37 -0400 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:37912) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oITFr-0005lS-R3 for 56682@debbugs.gnu.org; Mon, 01 Aug 2022 07:06:36 -0400 Original-Received: from pmg2.iro.umontreal.ca (localhost.localdomain [127.0.0.1]) by pmg2.iro.umontreal.ca (Proxmox) with ESMTP id 6A3B98059C; Mon, 1 Aug 2022 07:06:30 -0400 (EDT) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg2.iro.umontreal.ca (Proxmox) with ESMTP id DD2428049E; Mon, 1 Aug 2022 07:06:24 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1659351984; bh=J4ZUlgh55eJlsRhZYr7M2QBkLWHBXuArEZI9DBp6I98=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=OvWA2mQ5uuYwXAeo6REycZOuyikYJ2/4+xp+Yp1iMYSe3WiQnmzNvlxBqwQQlPbJH QL5gYZPFgf5fh2eI9rpsIFS0V3qpHlFluHuiBv0dVl+c7FD2aBO3jJuiGw1ruYAE9x GRU3qBWpIWcz+u11eBWKevikq3JJ1sqF25ypPF7qmRrwcZchThw6WlTEMh6ZLEJt60 bTtDJwm1/C2ricI1y+Bhcq8wD+751WlH3GNovPIGmowMkf8l2h32GKY6sARNYbrbo1 i3Dvrg1+G1rKWzmnx9I/TyQYdNqHdiROJ60k88IbMzoro0BhnhCgoqEheR5Zb158dU 6ELWuGDoKzOcw== 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 F21CF1201E4; Mon, 1 Aug 2022 07:06:23 -0400 (EDT) In-Reply-To: (Gregory Heytings's message of "Mon, 01 Aug 2022 09:34:18 +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:238407 Archived-At: > The problem is that this is, as I said, slow. On my laptop, opening a 1 GB > file takes about 6 seconds. The call to syntax-ppss adds 70 seconds, so > opening a large file becomes an order of magnitude slower (13 times slower). It's meaningless to talk about the time taken by `syntax-ppss` without specifying the major mode that was in use. You might also want to compare to the time to run (parse-partial-sexp (point-min) (point-max)) which is a kind of "speed of light" for `syntax-ppss`. Stefan