From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#56682: Fix the long lines font locking related slowdowns Date: Thu, 04 Aug 2022 08:40:01 +0300 Message-ID: <83pmhg4le6.fsf@gnu.org> References: <8c7321f2f3400a5db9be@heytings.org> <8c7321f2f388e5343475@heytings.org> <6ea376f6-d503-06d8-6d83-50c52b695394@yandex.ru> <8c7321f2f3ac52bfee4b@heytings.org> <8c7321f2f3ec1ef81af9@heytings.org> <02e83b0e-1b5c-fe75-6e59-1f8ddff82d37@yandex.ru> <96f28fd8-6744-1925-0631-0095099362dd@yandex.ru> <74ddc877f1b74ab56d18@heytings.org> <83r11y5a9d.fsf@gnu.org> <83h72t5y2d.fsf@gnu.org> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="26988"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 56682@debbugs.gnu.org, gregory@heytings.org, dgutov@yandex.ru To: Stefan Monnier Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Thu Aug 04 07:42:14 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 1oJTcc-0006qD-KA for geb-bug-gnu-emacs@m.gmane-mx.org; Thu, 04 Aug 2022 07:42:14 +0200 Original-Received: from localhost ([::1]:36208 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oJTcb-0007Yq-6G for geb-bug-gnu-emacs@m.gmane-mx.org; Thu, 04 Aug 2022 01:42:13 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:51438) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oJTbS-0007WJ-RI for bug-gnu-emacs@gnu.org; Thu, 04 Aug 2022 01:41:02 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:32833) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1oJTbS-0004Sb-FN for bug-gnu-emacs@gnu.org; Thu, 04 Aug 2022 01:41:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1oJTbS-0004tk-Aq for bug-gnu-emacs@gnu.org; Thu, 04 Aug 2022 01:41:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 04 Aug 2022 05:41:02 +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=B56682.165959161518747 (code B ref 56682); Thu, 04 Aug 2022 05:41:02 +0000 Original-Received: (at 56682) by debbugs.gnu.org; 4 Aug 2022 05:40:15 +0000 Original-Received: from localhost ([127.0.0.1]:50815 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oJTag-0004sI-Qq for submit@debbugs.gnu.org; Thu, 04 Aug 2022 01:40:15 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:38346) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oJTaf-0004s3-2G for 56682@debbugs.gnu.org; Thu, 04 Aug 2022 01:40:14 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:34476) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oJTaZ-0004KX-Ef; Thu, 04 Aug 2022 01:40:07 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=kjSJJTOPW+PKcmhiFSRuF8LpWjBit7O4f6Dxyr/Qbh4=; b=JFc+bk8XHLv4 BaGpE2+Qox6X+lxA+Oi3tCZzkFYQ1Q3yxXan3z49L/Q1vNvwjF0daaU5QsAm7L/MBz1QrcywoJ4sS kO5sA2o39nmofRTqnhIG4ilqCZ58tvb5VB+A1CDmCmDWe9/Gq6nu+qrt72+zi2ZOpN8lISkxbKc7o UTToGFe87EAqv4ZdWwaKNS7jQbE00vZN3zwTPzttbZCRfmrhwbOCL3FhqPClB/mJGhNRXwvH0oPcr 54nHy8RIDcdoIZFskplvK7YtH3w0Kog3P0F24nYc9Ljivg4CwH09I6r3amLNVSouCvLbuBP0z60BV lblhMSZ6O5QffzWjT/Jr6g==; Original-Received: from [87.69.77.57] (port=1193 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oJTaX-0005zE-8i; Thu, 04 Aug 2022 01:40:07 -0400 In-Reply-To: (message from Stefan Monnier on Wed, 03 Aug 2022 16:38:57 -0400) 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:238674 Archived-At: > From: Stefan Monnier > Cc: gregory@heytings.org, dgutov@yandex.ru, 56682@debbugs.gnu.org > Date: Wed, 03 Aug 2022 16:38:57 -0400 > > > What about parse-partial-sexp, which calls scan_sexps_forward? It > > looks like I've misremembered, and that was the culprit in the > > scenario we discussed, see > > https://debbugs.gnu.org/cgi/bugreport.cgi?bug=45898#92. > > The wholelines problem did not kick in because of PPS nor `syntax-ppss` > but because of font-lock (which then called `syntax-ppss` which then > called PPS). If it's font-lock that forces syntax-ppss to examine the whole huge line, then what is your proposal for avoiding that which doesn't involve some more-or-less arbitrary restrictions on the part of the buffer that can be examined by syntax-ppss?