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: Wed, 10 Aug 2022 08:59:42 +0000 Message-ID: References: <83v8rc2n1h.fsf@gnu.org> <64084296-1953-8ef8-5938-adfb6fb9b43f@yandex.ru> <83r11uzs8n.fsf@gnu.org> <14845631-c2ef-8371-8606-c858092e3192@yandex.ru> <83mtcizov2.fsf@gnu.org> <83h72qzheq.fsf@gnu.org> <25717d84-3411-a93a-3620-e04fe0571aff@yandex.ru> <83edxuzemr.fsf@gnu.org> <83a68hzz0a.fsf@gnu.org> <6ae35c93062c589b2e02@heytings.org> <7b7fbad7-55ac-49b8-840f-7f89a7e8771a@yandex.ru> <6ae35c93064b3588974c@heytings.org> <6ae35c9306c515f420d8@heytings.org> <87k07gwkjq.fsf@gmx.net> 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="1415"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 56682@debbugs.gnu.org, Eli Zaretskii , monnier@iro.umontreal.ca, Dmitry Gutov To: Stephen Berman Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Wed Aug 10 11:00:49 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 1oLha5-000Adl-Cr for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 10 Aug 2022 11:00:49 +0200 Original-Received: from localhost ([::1]:58608 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oLha3-0007HR-U0 for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 10 Aug 2022 05:00:47 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:49088) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oLhZL-0007EA-5F for bug-gnu-emacs@gnu.org; Wed, 10 Aug 2022 05:00:04 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:56278) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1oLhZK-0006iW-RY for bug-gnu-emacs@gnu.org; Wed, 10 Aug 2022 05:00:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1oLhZK-0008NI-Od for bug-gnu-emacs@gnu.org; Wed, 10 Aug 2022 05:00:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Gregory Heytings Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 10 Aug 2022 09:00:02 +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=B56682.166012198632143 (code B ref 56682); Wed, 10 Aug 2022 09:00:02 +0000 Original-Received: (at 56682) by debbugs.gnu.org; 10 Aug 2022 08:59:46 +0000 Original-Received: from localhost ([127.0.0.1]:46027 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oLhZ4-0008MM-Hg for submit@debbugs.gnu.org; Wed, 10 Aug 2022 04:59:46 -0400 Original-Received: from heytings.org ([95.142.160.155]:46912) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oLhZ1-0008MC-T6 for 56682@debbugs.gnu.org; Wed, 10 Aug 2022 04:59:45 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=heytings.org; s=20220101; t=1660121982; bh=26gCmEVnrbmzrWudAtr2TVAcR7dDHOYE1/qpIhZIRY8=; h=Date:From:To:cc:Subject:In-Reply-To:Message-ID:References:From; b=XSnO5I+XCEghOtflFYzTZ6TZrtO8I12KpvzffRQymbsOo65nLlCay7yD1Fl3fH6kZ AD+//j55m7mLPanikJ4qZ/V+CHpeHSbLAaIEgMrh4in3Ltb2AThBIJ+fx8Oc4cZwNf pjuxKzCATMG7c95tRkeiIcxityHawfBdDabPy6T+lClhcTfa3A09rEAZZkiCd8F9fg Bn9cbHxAsI544Mdwrmm0LpCPdag3jPnCMniGU4TyHXDtZ4CddDLec5OSsDqDvYt+t0 vBe8//uyf4v/kUTwTcrXSuu5E7rGeKxAKu0iR1ra+H71YZc613vwBYdUXguFgmZjdA M0GkLZWxm9pOQ== In-Reply-To: <87k07gwkjq.fsf@gmx.net> 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:239255 Archived-At: > > When I visit addons.json (from my Firefox directory), which is a single > line of (only) 19540 characters, and type `C-n' and hold down both keys, > the cursor stops moving almost immediately (on the third visual line) > and after letting go of the keys and waiting several seconds, point > jumps down the buffer to its actual position; likewise with `C-p'. > This is on master with -Q, and is no different from Emacs 28 (the only > difference I notice is that in master the buffer is wrongly fontified > from position 8235 to the end, while in 28 the entire buffer is > correctly fontified). Is this expected? (When I enable so-long-mode in > the buffer, holding down `C-n' or `C-p' produces no delay, both in > master and 28.) > That's not expected, no, and rather surprising because it would contradict what we've seen so far. Can you post that file somewhere? The only possible reason I can see ATM is that the file contains Arabic characters, which are (and will remain) slow.