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 12:41:33 +0300 Message-ID: References: <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> <12348081660379417@sas2-a098efd00d24.qloud-c.yandex.net> <66bbbb95983414e79637@heytings.org> <66bbbb95983475c5f3b0@heytings.org> <0d67f253-c080-d750-c2cb-4a9591ff8c6c@yandex.ru> <83lerrl734.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; 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Sun, 14 Aug 2022 02:41:35 -0700 (PDT) Content-Language: en-US In-Reply-To: <83lerrl734.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:239632 Archived-At: On 14.08.2022 08:36, Eli Zaretskii wrote: >> Date: Sat, 13 Aug 2022 22:19:26 +0300 >> Cc:56682@debbugs.gnu.org, Eli Zaretskii, >> monnier@iro.umontreal.ca >> From: Dmitry Gutov >> >>> Buffers with long lines are rare enough.  It wouldn't make sense (and >>> would be a nightmare in terms of long term maintenance) to add 25 >>> defcustoms to allow anyone to fine-tune what Emacs does in such buffers. >> I have regularly encountered redisplay slowdown caused by long lines in >> my work. One doesn't need to have a 18 MB files to see them. >> >> Having a 5000-10000 character line is enough to see redisplay starting >> to stutter. And, of course, there's nothing font-lock related in those >> stutters. > Stuttering in redisplay (and I think you actually mean stuttering in > cursor motion commands, but let's ignore that difference for now) is a > known issue, but it is NOT the goal of this effort. The goal of this > effort is to avoid making Emacs_completely_unusable_ due to the need > to wait for many seconds for commands to complete and their results to > be shown on display. Stuttering, while somewhat annoying, doesn't > make Emacs unusable. > > So if you are talking about the cases of stuttering, you are focused > on cases that are of no particular interest to us here. Of course, > any improvement in those other cases will also be welcome, but it is > not directly related to what we are trying to do here, and may or may > not solve the cases that are of interest to us. They *are* solved by Gregory's work.