From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Kangas Newsgroups: gmane.emacs.bugs Subject: bug#23861: 25.1.50; fast-but-imprecise-scrolling: What does "somewhat inaccurate" mean? Date: Mon, 14 Oct 2019 14:35:25 +0200 Message-ID: References: <57727584.3060502@orcon.net.nz> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="83359"; mail-complaints-to="usenet@blaine.gmane.org" Cc: Phil Sainty , 23861-done@debbugs.gnu.org To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Mon Oct 14 14:36:16 2019 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1iJzaB-000LXS-FC for geb-bug-gnu-emacs@m.gmane.org; Mon, 14 Oct 2019 14:36:15 +0200 Original-Received: from localhost ([::1]:49210 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iJza8-0006Px-TJ for geb-bug-gnu-emacs@m.gmane.org; Mon, 14 Oct 2019 08:36:12 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:59080) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iJzZz-0006Ld-Lg for bug-gnu-emacs@gnu.org; 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Mon, 14 Oct 2019 05:35:36 -0700 (PDT) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.51.188.43 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.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:169262 Archived-At: Eli Zaretskii writes: >> From: Phil Sainty >> Date: Wed, 29 Jun 2016 01:03:00 +1200 >> >> It's unclear to me what the following excerpt from the docstring >> for the `fast-but-imprecise-scrolling' variable actually means: >> >> > Note that this optimization can cause the portion of the buffer >> > displayed after a scrolling operation to be somewhat inaccurate. >> >> "somewhat inaccurate" is incredibly vague if you don't already >> know what it means. > > It means that what's on the screen might not reflect what's in the > buffer. > > It's hard to tell anything more specific, since which redisplay > optimizations will be taken in each case depends on many factors on > which the user has no control. > >> Does it mean that the position scrolled to might be further (or >> less far) than it would have been otherwise? > > It could. > >> Does it mean that the font-locking may be incomplete or incorrect? > > It could. > >> Does it mean that the buffer text may appear corrupted?! > > It could, if faces change the font size. That was 3 years ago. It doesn't look like there is anything more to do here, so I'm closing this bug report. Please reopen the bug if that's incorrect. Best regards, Stefan Kangas