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 13:34:09 +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> <83fsig2ja2.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="38796"; 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 15:51:43 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 1oIVpf-0009vd-2G for geb-bug-gnu-emacs@m.gmane-mx.org; Mon, 01 Aug 2022 15:51:43 +0200 Original-Received: from localhost ([::1]:51630 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oIVpW-0000gF-Lq for geb-bug-gnu-emacs@m.gmane-mx.org; Mon, 01 Aug 2022 09:51:36 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:33720) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oIVZW-0006Sp-Uj for bug-gnu-emacs@gnu.org; Mon, 01 Aug 2022 09:35:02 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:50015) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1oIVZW-000354-IK for bug-gnu-emacs@gnu.org; Mon, 01 Aug 2022 09:35:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1oIVZW-0005o8-Es for bug-gnu-emacs@gnu.org; Mon, 01 Aug 2022 09:35:02 -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 13:35:02 +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=B56682.165936085222241 (code B ref 56682); Mon, 01 Aug 2022 13:35:02 +0000 Original-Received: (at 56682) by debbugs.gnu.org; 1 Aug 2022 13:34:12 +0000 Original-Received: from localhost ([127.0.0.1]:39760 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oIVYi-0005mf-FJ for submit@debbugs.gnu.org; Mon, 01 Aug 2022 09:34:12 -0400 Original-Received: from heytings.org ([95.142.160.155]:33866) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oIVYg-0005mU-49 for 56682@debbugs.gnu.org; Mon, 01 Aug 2022 09:34:10 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=heytings.org; s=20220101; t=1659360849; bh=rlfvogrSAJPQIeQQh3XQiNwWgQrPZV2HnpRsKaVSH0s=; h=Date:From:To:cc:Subject:In-Reply-To:Message-ID:References:From; b=MvPON3HOlV5/zK5MbRPKH7EzkKx+s/uUHWGtpVctpzBnXtan7TocX1TWxxrW505dD 8ME5pOdymtUINYd6J7JKcea2F6m50IJ6RGgGEaZCnnpbkl6j5+UoclMyW70us4LKd2 Ytd1NcL58SuVReESp8x0HBVzFjS80Y7M1KWO8e0nN4UgTvTt8OzKRkSLrGia1+So5y ZbfI7ujszmPAefXF7nBr2brRR1l5WsxDZUcnPuuijPZa3GScECRdES2I3D1xjzv6ER +Ay2+bzHpdZwF8Q1K/4uixBfxIQCYTVsPt4sPk19MRUZh7x3GZ4TJcChsUwMwPrjYE fbbthitJk+TLA== In-Reply-To: <83fsig2ja2.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:238440 Archived-At: >>> 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. > > But the buffer has changed, so the cache is not necessarily valid, > right? > I didn't look at the internals of syntax-ppss, but I'd guess (and again my tests seem to confirm) that it was designed well enough, and doesn't need to rescan the whole buffer whenever a single character is inserted.