From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Dmitry Gutov Newsgroups: gmane.emacs.bugs Subject: bug#56682: Fix the long lines font locking related slowdowns Date: Sun, 14 Aug 2022 21:18:31 +0300 Message-ID: <9552230b-5c58-c1d0-23d8-7444102a2392@yandex.ru> References: <92da07bd02a6cc861e1a@heytings.org> <837d3lzv8n.fsf@gnu.org> <2c8d6755-cfe2-6559-3fde-3fa30ffb411e@yandex.ru> <83mtcgy44k.fsf@gnu.org> <83k07jx5jn.fsf@gnu.org> <866e510d-a060-7daa-d002-97861d056fa7@yandex.ru> <1144021660321893@iva5-64778ce1ba26.qloud-c.yandex.net> <12348081660379417@sas2-a098efd00d24.qloud-c.yandex.net> <66bbbb95983414e79637@heytings.org> <66bbbb95983475c5f3b0@heytings.org> <0d67f253-c080-d750-c2cb-4a9591ff8c6c@yandex.ru> <83lerrl734.fsf@gnu.org> <83wnbbj7v4.fsf@gnu.org> <75c316c0-3346-e702-b114-41a7f899deb1@yandex.ru> <5900f20836ca3f305df8@heytings.org> <8ef8eaba-1add-e87e-247e-71888beaf1f8@yandex.ru> <5900f208366acefabeef@heytings.org> Mime-Version: 1.0 Content-Type: text/plain; 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Sun, 14 Aug 2022 11:18:33 -0700 (PDT) Content-Language: en-US In-Reply-To: <5900f208366acefabeef@heytings.org> 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:239689 Archived-At: On 14.08.2022 20:54, Gregory Heytings wrote: > >>> If the conclusion is, after some reasonable effort, that there is no >>> way to make syntax-ppss significantly faster in one way or another in >>> such cases, and that there is no way to make font locking reasonably >>> accurate even when it doesn't have access to the whole buffer, it >>> might make sense to provide user options to fine-tune the behavior. >>> But we are not there yet. >> >> Both conclusions lead to removing the applications of narrowing from >> handle_fontified_prop. >> > > I have seen no effort whatsoever to make syntax-ppss significantly > faster in one way or another. syntax-ppss is limited in its performance by parse-partial-sexp. Could you take a look at it? Seems like more of your area of expertise.