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: Tue, 02 Aug 2022 03:51:02 -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> <2f7eeea3-6ba9-d2c2-1fb9-dd40d2de2002@yandex.ru> <8c7321f2f368e8dd096d@heytings.org> <83tu6w2mrm.fsf@gnu.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="34745"; 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 , dgutov@yandex.ru To: Gregory Heytings Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Tue Aug 02 11:14:01 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 1oInyS-0008pJ-TW for geb-bug-gnu-emacs@m.gmane-mx.org; Tue, 02 Aug 2022 11:14:01 +0200 Original-Received: from localhost ([::1]:51938 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oInyR-0002o9-SH for geb-bug-gnu-emacs@m.gmane-mx.org; Tue, 02 Aug 2022 05:13:59 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:58674) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oImh8-0006pM-Sm for bug-gnu-emacs@gnu.org; Tue, 02 Aug 2022 03:52:11 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:52437) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1oImh8-0007Zm-K0 for bug-gnu-emacs@gnu.org; Tue, 02 Aug 2022 03:52:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1oImh8-0002lf-Fk for bug-gnu-emacs@gnu.org; Tue, 02 Aug 2022 03:52:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Stefan Monnier Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 02 Aug 2022 07:52:02 +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=B56682.165942667510586 (code B ref 56682); Tue, 02 Aug 2022 07:52:02 +0000 Original-Received: (at 56682) by debbugs.gnu.org; 2 Aug 2022 07:51:15 +0000 Original-Received: from localhost ([127.0.0.1]:42186 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oImgN-0002kf-4o for submit@debbugs.gnu.org; Tue, 02 Aug 2022 03:51:15 -0400 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:23635) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oImgK-0002kP-QD for 56682@debbugs.gnu.org; Tue, 02 Aug 2022 03:51:13 -0400 Original-Received: from pmg3.iro.umontreal.ca (localhost [127.0.0.1]) by pmg3.iro.umontreal.ca (Proxmox) with ESMTP id 756FF440B1E; Tue, 2 Aug 2022 03:51:07 -0400 (EDT) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg3.iro.umontreal.ca (Proxmox) with ESMTP id 1FC8C44032C; Tue, 2 Aug 2022 03:51:06 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1659426666; bh=NdXSS2l+q15uIkXe4rOIRgZ5M2ELkWpXBUUd/h1se6U=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=KKC4jJWvcca1J5i2QTXvNx6hEcYe5wCpDIU/+tJqTwH96+5bL/YKFjW5tIleqmoqA XY+jgaAe/rfpzbcgpBivmU2xr07wLKtmWHNEKSrMQ2bJgCXShwkV8eoD6S+ZZdJ9jL fBsQtfmlWA5s05JZkleD0ZTxKq/ifd03yqTZydhXXaTrymKhZAsEQexx2ass63jHkY IFIGR97bSbTDMYlZDW4R50RZpm8mFe/JAJxhyBAAFa/K3wirlA7kCUAbyLeSsxmEPx CoSqJd4Y9mtwTjW6IuUNR2GPgSflsClF6gjrYg9/q+v9lA39X55lcL9i0/Nj3owXmP jVZgcKpy5mmiA== Original-Received: from milanesa (dyn.144-85-175-211.dsl.vtx.ch [144.85.175.211]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id 36197120202; Tue, 2 Aug 2022 03:51:05 -0400 (EDT) In-Reply-To: (Gregory Heytings's message of "Mon, 01 Aug 2022 12:20:39 +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:238497 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. The problem will re-occur if you change something at the beginning of the buffer and then go back to the end of the buffer. I think something like `font-lock-defer` which displays the text unfontified until we had time to apply the fontification should make the 1GB case much more usable (tho currently, it's probably not quite good enough). Stefan