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: Tue, 2 Aug 2022 17:08:01 +0300 Message-ID: <2bd8c14f-bb2b-4e0e-882c-0155e1fe52fa@yandex.ru> References: <837d46mjen.fsf@gnu.org> <8a3eaeef01be5bfaa5ef@heytings.org> <05388e8d8812bfa3695d@heytings.org> <83v8rf5894.fsf@gnu.org> <65cb7c73fd4a999cca00@heytings.org> <8c7321f2f3400a5db9be@heytings.org> <8c7321f2f388e5343475@heytings.org> <6ea376f6-d503-06d8-6d83-50c52b695394@yandex.ru> <8c7321f2f3ac52bfee4b@heytings.org> <2f7eeea3-6ba9-d2c2-1fb9-dd40d2de2002@yandex.ru> <8c7321f2f368e8dd096d@heytings.org> <56a688f6-6c93-8b67-895c-2c41f563fc93@yandex.ru> <83sfmg2mkv.fsf@gnu.org> <17c0d4df-78f5-76f4-784d-5c9d52eb7fa0@yandex.ru> 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"; 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[212.31.107.118]) by smtp.googlemail.com with ESMTPSA id m23-20020a05600c3b1700b003a30fbde91dsm25840377wms.20.2022.08.02.07.08.02 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 02 Aug 2022 07:08:03 -0700 (PDT) Content-Language: en-US In-Reply-To: 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:238553 Archived-At: On 02.08.2022 10:55, Stefan Monnier wrote: >> only top and bottom of the buffer are fontified), with the caveat that >> font-lock always tries to backtrack to BOL when fontifying the current >> hunk. Which makes sense, of course, but could be tweaked for long lines to >> avoid re-fontifying the whole buffer again and again. > It has already been (recently) tweaked for this on `master`. Sorry I missed that. Commit 15b2138719b34083967001c3903e7560d5e0947c, right? Then, as long as redisplay avoids narrowing when running fontification-functions, everything should work well. Or at least much better than before.