From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Ihor Radchenko Newsgroups: gmane.emacs.bugs Subject: bug#56682: Fix the long lines font locking related slowdowns Date: Tue, 16 Aug 2022 12:38:37 +0800 Message-ID: <87r11gztte.fsf@localhost> References: <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> <83wnbckp0q.fsf@gnu.org> <8e884ebe-2d2e-d599-15c3-a5cfe5e6b295@yandex.ru> <83o7wnl7ok.fsf@gnu.org> <036414cc-c711-efaf-ed5b-f8ccfaca0604@yandex.ru> <5900f20836753183a6ac@heytings.org> <5c22e38a-5dcd-860e-28a0-b4a5ede6a21b@yandex.ru> <877d3awb92.fsf@localhost> <87pmh2z277.fsf@localhost> <83pmh1iwng.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="27298"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 56682@debbugs.gnu.org, gregory@heytings.org, monnier@iro.umontreal.ca, dgutov@yandex.ru To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Tue Aug 16 06:38:10 2022 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1oNoLB-0006uM-Fn for geb-bug-gnu-emacs@m.gmane-mx.org; Tue, 16 Aug 2022 06:38:09 +0200 Original-Received: from localhost ([::1]:60040 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oNoLA-00073b-A3 for geb-bug-gnu-emacs@m.gmane-mx.org; Tue, 16 Aug 2022 00:38:08 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:38802) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oNoL4-00073T-5q for bug-gnu-emacs@gnu.org; Tue, 16 Aug 2022 00:38:02 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:54780) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1oNoL3-0004Im-Sf for bug-gnu-emacs@gnu.org; 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Tue, 16 Aug 2022 00:37:39 -0400 Original-Received: by mail-pj1-f52.google.com with SMTP id e8-20020a17090a280800b001f2fef7886eso8555493pjd.3 for <56682@debbugs.gnu.org>; Mon, 15 Aug 2022 21:37:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=mime-version:message-id:date:references:in-reply-to:subject:cc:to :from:from:to:cc; bh=LB9lw8bvSi9Oemo3qT0LSr0GQd5EfQ+a6JTK9t5SiyQ=; b=OcBG1BRSoW8jbxuxdT9yoqZgdkioE5Kx2KdfH8HU7kVnLgjWXB7nT1P10DMGYY6wwB 7qslnD4D4OF7+8O82TmlwNTIWCkXLw7UtC179sd3UHmP4vwUR8togZx/RDxVhAmBcTNo MQ9QjettmE+FnmW5EhK9DnLwTaudojUwVX/T5U+vicjnZjw8CDfzhRW24VD5566VYQL8 J92bImjPGtEHWvMgaA6599mFJFzInfNJ1mKeI5lfa9dwdegiKvu1TkRftGu904EHFk/T g/8lB5twfEhXRDZ4AZM5jf/QhsBJEyeTd2w5sIHbjh9mHRsyRLKZpOfX7EUI8t1q86FC XN8g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=mime-version:message-id:date:references:in-reply-to:subject:cc:to :from:x-gm-message-state:from:to:cc; bh=LB9lw8bvSi9Oemo3qT0LSr0GQd5EfQ+a6JTK9t5SiyQ=; 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Specifically, in source block >> output. (http query) > > How long is "very long" in those cases? AFAIR, over a screen full of text when truncate-lines is set to nil. It should be over 5k symbols in my screen. I remember this because it triggered a significant fontification slowdown caused by some (now fixed) Org regexp hitting too many matches on that line. Also, I just checked some of my org files and found a >15k chars long line. -- Ihor Radchenko, Org mode contributor, Learn more about Org mode at https://orgmode.org/. Support Org development at https://liberapay.com/org-mode, or support my work at https://liberapay.com/yantar92