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: Fri, 05 Aug 2022 09:20:43 +0300 Message-ID: <83r11v1a9w.fsf@gnu.org> References: <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> <83pmhg4le6.fsf@gnu.org> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="12371"; 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 Fri Aug 05 08:21:20 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 1oJqhz-000319-JQ for geb-bug-gnu-emacs@m.gmane-mx.org; 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Original-Received: from [87.69.77.57] (port=4703 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 1oJqhQ-0000Di-Ej; Fri, 05 Aug 2022 02:20:44 -0400 In-Reply-To: (message from Stefan Monnier on Thu, 04 Aug 2022 18:35:36 -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:238816 Archived-At: > From: Stefan Monnier > Cc: gregory@heytings.org, dgutov@yandex.ru, 56682@debbugs.gnu.org > Date: Thu, 04 Aug 2022 18:35:36 -0400 > > >> 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? > > The use of `syntax-wholeline-max` in > `font-lock-extend-region-wholelines` supposedly fixed this problem since > it changed `font-lock` so it doesn't ask `syntax-ppss` to compute the > whole line/buffer. It did? And if it did, how is that better or different from a locked narrowing?