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: Sun, 07 Aug 2022 12:46:47 +0000 Message-ID: <6ae35c93064b3588974c@heytings.org> References: <83v8rf5894.fsf@gnu.org> <65cb7c73fd4a999cca00@heytings.org> <8c7321f2f3400a5db9be@heytings.org> <8c7321f2f388e5343475@heytings.org> <8c7321f2f36494299e61@heytings.org> <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> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="Q73TCIlCTJ" Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="5719"; 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 Sun Aug 07 14:47:46 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 1oKfh3-0001Fr-7m for geb-bug-gnu-emacs@m.gmane-mx.org; Sun, 07 Aug 2022 14:47:45 +0200 Original-Received: from localhost ([::1]:40420 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oKfh2-00019b-Bg for geb-bug-gnu-emacs@m.gmane-mx.org; Sun, 07 Aug 2022 08:47:44 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:42612) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oKfgN-0000OI-4v for bug-gnu-emacs@gnu.org; Sun, 07 Aug 2022 08:47:03 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:46400) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1oKfgM-0000rc-PZ for bug-gnu-emacs@gnu.org; Sun, 07 Aug 2022 08:47:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1oKfgM-0004kX-KW for bug-gnu-emacs@gnu.org; Sun, 07 Aug 2022 08:47:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Gregory Heytings Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 07 Aug 2022 12:47:02 +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=B56682.165987641218206 (code B ref 56682); Sun, 07 Aug 2022 12:47:02 +0000 Original-Received: (at 56682) by debbugs.gnu.org; 7 Aug 2022 12:46:52 +0000 Original-Received: from localhost ([127.0.0.1]:36142 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oKfgB-0004ja-JP for submit@debbugs.gnu.org; Sun, 07 Aug 2022 08:46:51 -0400 Original-Received: from heytings.org ([95.142.160.155]:43036) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oKfg9-0004jO-4b for 56682@debbugs.gnu.org; Sun, 07 Aug 2022 08:46:50 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=heytings.org; s=20220101; t=1659876407; bh=W7rv3R7SsKw1BtdVd4lt0E7Nh7DDkivEvF6jE0BhukY=; h=Date:From:To:cc:Subject:In-Reply-To:Message-ID:References:From; b=mOpRDWtuJbK4OG2IVTfWhb8WsjnvBtRunzo5ytMZKhj/Kg5tqO8EE1cnRpCndBhTp 4TXIXMe9MK5Nah074kU4ROEnT95fSU7xw7IY9o/ax40Jz/IfG2tFyhiKCartxpUiRs hbAS0ZKFXMEHX3rcVpgNjU0CWyqN8+/hedX09P6iDN41SgaxJYWPSNwboV0+v6iVVx F89LA2gvXCYdVIJqDnHvp1d0MaUXkKMJYeLaOXkm74D1oHTv+6/Imj61tauwByAP4+ /GAZeTCOzrdpY31KXwIRoGkx8wjc4G7z3+T0UvhXZcWfqz5ytGhj0psB09hb6TSrEm Sz9XsyjfuCuwg== In-Reply-To: <7b7fbad7-55ac-49b8-840f-7f89a7e8771a@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:239049 Archived-At: --Q73TCIlCTJ Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable >> They aren't, no.=C2=A0 Of course it all depends on where you are in the= =20 >> file, on your CPU, and so forth.=C2=A0 For me (with locked narrowing=20 >> disabled, in dictionary.json, with emacs -Q) M-> takes about 3 seconds. > > And it's about 1.5s here. > So you're the lucky owner of a fast computer. And using an optimized=20 build. Not everyone is in that fortunate situation. > > Once. > No, not once. It happens every time you modify the buffer and move far=20 enough in that buffer. >> Likewise, if I do for example C-s aan, and then repeat C-s, whenever=20 >> the next match is far enough in the buffer I see a delay of about 2=20 >> seconds. > > Sounds like a performance problem inside isearch. I might take a look. > No, isearch is entirely agnostic about font locking. >> Another test you can do is to lean on C-v after opening the buffer,=20 >> you'll see that Emacs becomes very sluggish, sometimes I have to wait=20 >> more than 5 seconds to avance from one screenfull. > > First of all, these aren't the tests Eli asked for or I performed. Why=20 > don't you compare apples to oranges? > > Leaning on C-v isn't a scientific test anyway: it compares the speed of= =20 > two processes internal to Emacs (event handling and rendering), rather=20 > than something objective. > It's yet another test meant to test Emacs' responsiveness, and it is as=20 "objective" as possible: does Emacs choke or does it not? --Q73TCIlCTJ--