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: Sat, 13 Aug 2022 19:48:41 +0300 Message-ID: References: <640c2e07-98e1-96d6-bb02-19f5f03f637f@yandex.ru> <834jyq29o1.fsf@gnu.org> <92da07bd028e3ede61a6@heytings.org> <47894c57-dd8b-5778-240a-3fa6540e4d37@yandex.ru> <92da07bd02941d5537e9@heytings.org> <5308e3b5-a160-17d7-77ee-b1d00acfa20d@yandex.ru> <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> <83mtc8n00z.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="18181"; 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Sat, 13 Aug 2022 09:48:43 -0700 (PDT) Content-Language: en-US In-Reply-To: <83mtc8n00z.fsf@gnu.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:239564 Archived-At: On 13.08.2022 09:13, Eli Zaretskii wrote: >>> I can only repeat that the only ways to improve font locking in a non-local >>> way (or at least, the only ways that were identified in the discussions so >>> far) are either to improve the speed of syntax-ppss by an order of >>> magnitude, in which case it would perhaps become feasible to allow >>> syntax-ppss to have access to the whole buffer, or to equip syntax-ppss with >>> heuristics to make it work "as well as possible" even when it only has >>> access to a portion of the buffer. >> But the locked narrowing is applied based on the presence of long-lines >> rather than based on the total size of the buffer. > That's true, but the two are closely related: a buffer with very long > lines tends also to be a large buffer. > The long-line related problems start to become noticeable much earlier than the buffer becomes "large".