From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.ciao.gmane.io!not-for-mail From: Dmitry Gutov Newsgroups: gmane.emacs.devel Subject: Re: Scrolling commands and skipping redisplay, was: Re: emacs rendering comparisson between emacs23 and emacs26.3 Date: Fri, 10 Apr 2020 18:55:09 +0300 Message-ID: <012cfb00-2683-5216-4606-2c8e6c2ff316@yandex.ru> References: <20200403174757.GA8266@ACM> <83blo7v68b.fsf@gnu.org> <1845d7aa-9ae4-3d95-6a30-c7b1d8d8adec@gmx.at> <83a73qt6zs.fsf@gnu.org> <97c4254e-ff43-8402-3645-f713c408c245@gmx.at> <83y2r9syby.fsf@gnu.org> <20200405195753.GG5049@ACM> <542b48ba-4dfa-820f-ba50-4b147ab6d8e2@yandex.ru> <0a5f70aa-4985-8f8d-81d6-6ac4a60a94f9@yandex.ru> <838sj8sphk.fsf@gnu.org> <834ktwsmfw.fsf@gnu.org> <83imibqsmm.fsf@gnu.org> <478c2aab-a5fc-61c2-02e2-2d9846b95273@yandex.ru> <83v9m9nltx.fsf@gnu.org> <83tv1rn8fx.fsf@gnu.org> <83o8rzmpfm.fsf@gnu.org> <83k12nmjyj.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="ciao.gmane.io:159.69.161.202"; logging-data="127112"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 Cc: acm@muc.de, rudalics@gmx.at, rrandresf@gmail.com, rms@gnu.org, emacs-devel@gnu.org To: Eli Zaretskii , Stefan Monnier Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Fri Apr 10 17:56:24 2020 Return-path: Envelope-to: ged-emacs-devel@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 1jMw10-000Wuf-Vk for ged-emacs-devel@m.gmane-mx.org; Fri, 10 Apr 2020 17:56:22 +0200 Original-Received: from localhost ([::1]:36060 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jMw0z-0005Sc-W2 for ged-emacs-devel@m.gmane-mx.org; Fri, 10 Apr 2020 11:56:22 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:60785) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jMvzx-0004NF-3S for emacs-devel@gnu.org; Fri, 10 Apr 2020 11:55:17 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jMvzw-0004EE-9X for emacs-devel@gnu.org; Fri, 10 Apr 2020 11:55:17 -0400 Original-Received: from mail-wr1-x435.google.com ([2a00:1450:4864:20::435]:37122) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1jMvzu-0004CX-NC; Fri, 10 Apr 2020 11:55:14 -0400 Original-Received: by mail-wr1-x435.google.com with SMTP id w10so2742769wrm.4; Fri, 10 Apr 2020 08:55:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=L2MXQmSB5F/6clgK5plifalrRVZs4t/D3TOmcBuL7mw=; b=DYTrPS6GDpychWLlHLozZ7rIV1mgHc423qvXVe3MeK4ZJ2yLqee8bsUNUGNPRdnNS3 oxf6WgRd2PRj+3yOLCLoN1lKzHc7OqZ75t3NIVl38PyjIsh3VvwV7Olq8qY/H5koodtV AgsLGznxWrOf8EeyrMKDpiDRgGZU7K/XdqkGyHo5anr8TfWgi4w8+HTYgWY0cv/LGOi3 geiAfoqiMF57wXPtxak1KFTHPHFPo4bJQtlTMVR3puuM8iQwAPzUdmoo5qc17WdjcU0M fg6aFtrfwIZ39+iqFdfmZ+Cc7zQ3tZbyKEPEmlyuz7lzqJp3BrOgBCIDF46SX6nOxuh+ 1YCA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:subject:to:cc:references:from:message-id :date:user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=L2MXQmSB5F/6clgK5plifalrRVZs4t/D3TOmcBuL7mw=; b=CSjWzOaHYpQKyR4aCXIDkQCdL0LSGcTRwLhq7adswTXpjwocd563VT7bW1ooUU7L6z hihuTWkORSx7yn4wiSqpx4yu9gD9fGif1ltd/4JGkLgNgNffdtJiOljV5SW5o+ZmRK+2 qGFMU4NOvkT/5V06gxTBBEbasjjj2+DYi3G6P6eyixc4FARfyWaRkltuRzZdUE/P3ZCD DfsMm0U0vWIJUHKz0voPl2MNGgocuKadPQaNr7+XJMxHUHZvbNOCaNJT28vFyTn6rGq1 9XZQOGQeDWxFkd3lDGrFtRLxWNnmLoXTPyYYi05iHRjsXj3qKOFZGATuvdIEaUhT89jR lDBA== X-Gm-Message-State: AGi0PuZaEJHIkLdnmad/yvGQHunYZLLXwiWcajclU+pmC1yHeLWl0YLc OLppBtmLtBKRXhZCbeknuNY= X-Google-Smtp-Source: APiQypJ6sZchE7l4MPHIzFe9D7eZTmBU3h9XBEM6o1H/WSnh0vXLHMU5TVbOKsYnsry3T2IJPmE/Og== X-Received: by 2002:adf:84c2:: with SMTP id 60mr5149383wrg.65.1586534113553; Fri, 10 Apr 2020 08:55:13 -0700 (PDT) Original-Received: from [192.168.0.2] ([66.205.73.129]) by smtp.googlemail.com with ESMTPSA id t2sm3279656wrs.7.2020.04.10.08.55.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 10 Apr 2020 08:55:12 -0700 (PDT) In-Reply-To: <83k12nmjyj.fsf@gnu.org> Content-Language: en-US X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2a00:1450:4864:20::435 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:246776 Archived-At: On 10.04.2020 18:36, Eli Zaretskii wrote: >>>>> Depends on what you mean by "precision". They might very well miss >>>>> some parts of the buffer entirely, i.e. never see them on display. >>>> But that happens regardless of whether the scroll is computed correctly, >>>> because redisplay itself is skipped. >>> It isn't skipped here if I use jit-lock-defer-time. >> I was talking about `fast-but-imprecise-scrolling` > Now I'm confused: fast-but-imprecise-scrolling doesn't skip redisplay. Allow me to annotate one of the previous replies: regardless of whether the scroll is computed correctly (i.e. whether fast-but-imprecise-scrolling is nil or t) redisplay itself is skipped. And it can also be skipped on slow enough machines, even with font-lock disabled altogether.