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: Thu, 04 Aug 2022 01:34:39 +0000 Message-ID: <3d639ea12660c60bb9f1@heytings.org> References: <05388e8d8812bfa3695d@heytings.org> <83v8rf5894.fsf@gnu.org> <65cb7c73fd4a999cca00@heytings.org> <8c7321f2f3400a5db9be@heytings.org> <8c7321f2f388e5343475@heytings.org> <8c7321f2f36494299e61@heytings.org> <8c7321f2f336523624e3@heytings.org> <83r1202meh.fsf@gnu.org> <6020ffaf-9069-0070-76cf-a13379ef01b5@yandex.ru> <83les71ilg.fsf@gnu.org> <06c5560d-3009-e5a5-3d33-fe5d2ec32d6b@yandex.ru> <74ddc877f17a06d8f120@heytings.org> <83wnbq62sz.fsf@gnu.org> <74ddc877f1b7de1eaf91@heytings.org> <9a8f98b5-3943-be38-908a-3aad3f282ccb@yandex.ru> <68722578-414c-a0d9-57f2-21a0e6d74c0f@yandex.ru> <83k07p5ymu.fsf@gnu.org> <3e180c88-3ee8-7049-dc3f-88ae2636cfe1@yandex.ru> 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="25556"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 56682@debbugs.gnu.org, Eli Zaretskii , monnier@iro.umontreal.ca To: Dmitry Gutov Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Thu Aug 04 03:35:22 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 1oJPlg-0006Mv-2o for geb-bug-gnu-emacs@m.gmane-mx.org; Thu, 04 Aug 2022 03:35:20 +0200 Original-Received: from localhost ([::1]:35640 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oJPle-0001Xk-JL for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 03 Aug 2022 21:35:18 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:37252) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oJPlR-0001XO-6P for bug-gnu-emacs@gnu.org; Wed, 03 Aug 2022 21:35:05 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:60823) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1oJPlO-0007E9-EF for bug-gnu-emacs@gnu.org; Wed, 03 Aug 2022 21:35:04 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1oJPlO-0006kG-8d for bug-gnu-emacs@gnu.org; Wed, 03 Aug 2022 21:35:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Gregory Heytings Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 04 Aug 2022 01:35:02 +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=B56682.165957688225893 (code B ref 56682); Thu, 04 Aug 2022 01:35:02 +0000 Original-Received: (at 56682) by debbugs.gnu.org; 4 Aug 2022 01:34:42 +0000 Original-Received: from localhost ([127.0.0.1]:50572 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oJPl4-0006jZ-50 for submit@debbugs.gnu.org; Wed, 03 Aug 2022 21:34:42 -0400 Original-Received: from heytings.org ([95.142.160.155]:37828) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oJPl2-0006jR-GE for 56682@debbugs.gnu.org; Wed, 03 Aug 2022 21:34:40 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=heytings.org; s=20220101; t=1659576879; bh=dyW1aMohOGN4g+8lezXAt5yLyEbyGrLDTAFyOupo8YY=; h=Date:From:To:cc:Subject:In-Reply-To:Message-ID:References:From; b=8gLskJPB9AGGxHimGGRYfUuL4Ka/iRJv1MYmgBjlPTf40WPvW/nyHChGfpSKRwuTI s5iq0v9u4s+OkdhSBTTU6HgBCVCxV3bOztpoXIcX75y5l7/gsDEeL/oMVQgW3YrdaQ 1bw0A/E9y+uFPc28V+OBydEDM8TlRmVaCymcQ9Ym2MHQhpwsNa2wx7Mj+kVKMHcgld iGmOh8o8SBo9BdJEhTWt9Vzc1Si+KsyGlUZNbpX9iYl1bTKeaymtmYC34FDddX/pPB rHxljFWSZPEmt9MiGO/j9qHYF0meqvnxguDXs0ZBmJV2qu61EUn+sStqZ4AROWEbUQ YkYuSISamF0YA== In-Reply-To: <3e180c88-3ee8-7049-dc3f-88ae2636cfe1@yandex.ru> 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:238667 Archived-At: > > So to try to debug any remaining speed issues with font-lock, it would > be great to eliminate other sources of slow display first. In particular > ones coming from a low-level subsystem I cannot as easily > benchmark/debug/etc as Lisp code. > > The setting > > (setq long-line-threshold nil syntax-wholeline-max most-positive-fixnum) > > indeed makes all the speed issues come back, including the > aforementioned sluggishness. > If you want to see only the slowdowns cause by font locking, just comment out the "if (current_buffer->long_line_optimizations_p)" in xdisp.c:handle_fontified_prop.