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: Sat, 23 Jul 2022 11:46:37 -0400 Message-ID: References: <837d46mjen.fsf@gnu.org> <8335esjppt.fsf@gnu.org> <837d43j198.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="28053"; 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, gregory@heytings.org To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Sat Jul 23 17:47:27 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 1oFHLi-0006uy-Gi for geb-bug-gnu-emacs@m.gmane-mx.org; Sat, 23 Jul 2022 17:47:26 +0200 Original-Received: from localhost ([::1]:38392 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oFHLh-0005HO-6O for geb-bug-gnu-emacs@m.gmane-mx.org; Sat, 23 Jul 2022 11:47:25 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:54218) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oFHLK-0005EI-A5 for bug-gnu-emacs@gnu.org; Sat, 23 Jul 2022 11:47:02 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:56349) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1oFHLK-00026D-2C for bug-gnu-emacs@gnu.org; Sat, 23 Jul 2022 11:47:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1oFHLJ-0008Tf-TM for bug-gnu-emacs@gnu.org; Sat, 23 Jul 2022 11:47:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Stefan Monnier Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 23 Jul 2022 15:47:01 +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=B56682.165859120832565 (code B ref 56682); Sat, 23 Jul 2022 15:47:01 +0000 Original-Received: (at 56682) by debbugs.gnu.org; 23 Jul 2022 15:46:48 +0000 Original-Received: from localhost ([127.0.0.1]:46098 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oFHL6-0008TB-Ac for submit@debbugs.gnu.org; Sat, 23 Jul 2022 11:46:48 -0400 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:18926) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oFHL3-0008Sq-M5 for 56682@debbugs.gnu.org; Sat, 23 Jul 2022 11:46:46 -0400 Original-Received: from pmg3.iro.umontreal.ca (localhost [127.0.0.1]) by pmg3.iro.umontreal.ca (Proxmox) with ESMTP id CE1AD44181F; Sat, 23 Jul 2022 11:46:39 -0400 (EDT) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg3.iro.umontreal.ca (Proxmox) with ESMTP id B9B9F441818; Sat, 23 Jul 2022 11:46:38 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1658591198; bh=5s6rYNqLx87RDMi5pEINczdjuq6eL1KBeRvw74IkeQY=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=jiWAQU98RSEVOYD8hF/MprQMdLD+KR1WMJMSYtAUlxyF4IpmoPUAMFvRW60tMi8Wi 8+YULT1NXdR1wEHcegmIf1u3fJ8QGPiIBlEMQ/DKgrUW/Tm2fwdrSjjoR9FeARxo1p pOOfcN+flCFUA7++cQoLagvKUscWKMfnDucT8VuJ9+oSIIR4Ot5VXnvsHMFRdESJuq PZ8T459Bbmg9e4kLuEkxAhVYXWA1uFQNpcwsS7YClyQ2VcR3fJ9hhf2oWFov5zgcrB Aaw/41ZXhRyCn8HQgfM+AWfTYapfnUtPrMlBM8Ax7jUnrsa9ezRkcgIVNDvVAhGgDJ t1TxpUhZQWWqA== Original-Received: from pastel (unknown [45.72.195.111]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id 85A221202BD; Sat, 23 Jul 2022 11:46:38 -0400 (EDT) In-Reply-To: <837d43j198.fsf@gnu.org> (Eli Zaretskii's message of "Sat, 23 Jul 2022 18:29:39 +0300") 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:237762 Archived-At: >> AFAIK if the buffer has not been modified (including things like >> changing `window-start` or `point`), then a redisplay will just not >> run jit-lock (and hence font-lock) at all, no matter how thorough. > But the fact is without font-lock the response is faster by a large > factor. So something, somewhere, still depends on font-lock. Yes, that's the part that we need to explore. Maybe font-lock *is* run somehow? Or maybe it's just the mere presence of text properties? (Or overlays?) Stefan