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 23:19:26 +0300 Message-ID: <592687d9-1acc-ea5a-745f-5f280bf13b1b@yandex.ru> References: <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> <83y1vtmjld.fsf@gnu.org> <8868631660327773@iva2-775ff39c77bc.qloud-c.yandex.net> <83pmh4n0t8.fsf@gnu.org> <83a688md9r.fsf@gnu.org> <66bbbb95982d148fd1bc@heytings.org> <66bbbb95986014f48e4c@heytings.org> <7747f63b-5cf7-4c40-78ab-98aa7d1a8bc3@yandex.ru> <66bbbb95983c3923df25@heytings.org> Mime-Version: 1.0 Content-Type: text/plain; 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Sat, 13 Aug 2022 13:19:28 -0700 (PDT) Content-Language: en-US In-Reply-To: <66bbbb95983c3923df25@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:239593 Archived-At: On 13.08.2022 22:54, Gregory Heytings wrote: >> It showed specific pitfalls we can take care of in other major modes >> as well. >> > > It doesn't.  Please do (on you Core i9 computer): > > for i in $(seq 1 60); do cat dictionary.json; done > hugedictionary.json > > Now open that file with the code on master, and with your branch, and > type M->.  With the code on master the effect is instantaneous (about 50 > ms on my computer), with your branch it takes ~20 seconds (21 seconds on > my computer).  If you cannot see the difference, I don't know what else > I could say.  And please don't tell me "but this is not the kind of file > size we should care about". Why would I tell you that after I already spent the effort (yesterday morning) to make sure the branch contains whole two alternative working strategies for handling such very large files? Should I explain them again?