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: Sat, 13 Aug 2022 17:26:02 +0000 Message-ID: <66bbbb9598e592884ab2@heytings.org> References: <834jyq29o1.fsf@gnu.org> <92da07bd028e3ede61a6@heytings.org> <47894c57-dd8b-5778-240a-3fa6540e4d37@yandex.ru> <92da07bd02941d5537e9@heytings.org> <5308e3b5-a160-17d7-77ee-b1d00acfa20d@yandex.ru> <92da07bd02a6cc861e1a@heytings.org> <837d3lzv8n.fsf@gnu.org> <2c8d6755-cfe2-6559-3fde-3fa30ffb411e@yandex.ru> <83mtcgy44k.fsf@gnu.org> <83k07jx5jn.fsf@gnu.org> <866e510d-a060-7daa-d002-97861d056fa7@yandex.ru> <1144021660321893@iva5-64778ce1ba26.qloud-c.yandex.net> <66bbbb9598b42aea3b87@heytings.org> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="S1078rsXfk" Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="8579"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 56682@debbugs.gnu.org, Eli Zaretskii , Stefan Monnier To: Dmitry Gutov Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Sat Aug 13 19:27:22 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 1oMuuu-00021O-Hp for geb-bug-gnu-emacs@m.gmane-mx.org; Sat, 13 Aug 2022 19:27:20 +0200 Original-Received: from localhost ([::1]:33800 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oMuut-0007K3-Jz for geb-bug-gnu-emacs@m.gmane-mx.org; Sat, 13 Aug 2022 13:27:19 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:40444) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oMuud-0006sy-02 for bug-gnu-emacs@gnu.org; Sat, 13 Aug 2022 13:27:03 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:45269) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1oMuuc-0005dm-Ih for bug-gnu-emacs@gnu.org; Sat, 13 Aug 2022 13:27:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1oMuuc-00076U-Ei for bug-gnu-emacs@gnu.org; Sat, 13 Aug 2022 13:27:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Gregory Heytings Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 13 Aug 2022 17:27:02 +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=B56682.166041156627247 (code B ref 56682); Sat, 13 Aug 2022 17:27:02 +0000 Original-Received: (at 56682) by debbugs.gnu.org; 13 Aug 2022 17:26:06 +0000 Original-Received: from localhost ([127.0.0.1]:35018 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oMuti-00075N-3q for submit@debbugs.gnu.org; Sat, 13 Aug 2022 13:26:06 -0400 Original-Received: from heytings.org ([95.142.160.155]:51570) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oMutf-00075F-5l for 56682@debbugs.gnu.org; Sat, 13 Aug 2022 13:26:03 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=heytings.org; s=20220101; t=1660411562; bh=gY2NXjoRImKaqFsxCelcBgYEYZxUqptoqhCKyGptveE=; h=Date:From:To:cc:Subject:In-Reply-To:Message-ID:References:From; b=jJkGTZRaIyekoukrYn+Z9Ikk5hWgj57t/dLI6LxGmi84YinGIO4P5SGQYaK+PpiXM ojuqqdyTXSaXME6Pi3KT1uUyqb4/gKIkt/qkrFiBEY488Adt72Tb0jcq1txvvncU9B keqivPVMkcJJoeCDg8V8aMCixLzQ7TxOE3UVx/krrTdis/56n76005O0UZy3pIoibB jZup5jAZ7UNlWqdmLXn0Jm3Eg/CIXZIx+3iAgHjXwlCt73IRBJxU9ZDIH8FsC9YMyj vsypIM/L69205BHXuY7ixIpCAjKzp+pCYTgeCSIF7l/o+POi4MeFr5kZcXJNzCefxW yd7RRq/Hh2dgw== In-Reply-To: Content-ID: <66bbbb9598e5a358e282@heytings.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:239574 Archived-At: --S1078rsXfk Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable Content-ID: <66bbbb95987bc94060a7@heytings.org> >> That's what I initially thought, too.=C2=A0 Now I tend to think that it= =20 >> would be better to not decouple these two cases, because it would be=20 >> too expensive to distinguish the four possible cases, namely: > > I'm fairly sure that my branch demonstrates that there's nothing=20 > expensive about it. > If you think this, it means you do not fully understand the problem,=20 sorry. Detecting the presence of long lines in a buffer takes time, and=20 it takes more time as the buffer becomes larger. Again all this has been= =20 discussed, tested and fine-tuned a month ago. > > It's just one commit, 20 additions, 10 deletions. It should take 2=20 > minutes max to read and understand it. > As I said, I tested that commit. And I understood it, too. What you do=20 there does not even depend on the presence of long lines in the buffer (or= =20 on the length of the buffer). Moreover it does not offer any protection=20 against modes which use widen in their font locking routines. Which was=20 the main reason to add the locked narrowing feature. --S1078rsXfk--