From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#74813: 31.0.50; scroll-down is 10x slower and laggy than scroll-up Date: Fri, 10 Jan 2025 10:01:42 +0200 Message-ID: <86h66714ih.fsf@gnu.org> References: <87ikrpgwlk.fsf@Mufasa.mail-host-address-is-not-set> <86a5d11d0u.fsf@gnu.org> <864j2oul7t.fsf@gnu.org> <864j2eeqcv.fsf@gnu.org> <8af271ae-f0da-4b7f-ba51-b68d9b67e8dd@gmail.com> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="40923"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 74813@debbugs.gnu.org To: execvy@gmail.com Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Fri Jan 10 09:03:31 2025 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 1tW9zO-000AQh-EC for geb-bug-gnu-emacs@m.gmane-mx.org; 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Fri, 10 Jan 2025 03:02:35 -0500 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tW9yP-0005bc-Jv; Fri, 10 Jan 2025 03:02:29 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=erme+HvtNYm4N2O2m6G/f4wDAuIVVB0K2dfeuN0a3vg=; b=WcBsFmPC5j0q uI9V6qVRRILoMkpMyjbXaCPd9PsyNwxJe0v9pF7PTWqPYbjRDSdY0OFaCspI2rgJ0LZXHfrTkATz7 yP7CNM9NzZ/AWQNYwXuqDybjW43WfBvuuxt/NR9Xaf6dZTZmvAi1WQPnriXQ9HzNeHMl6r85lETYE /5xrWfauYSlQHNg6PMUG9JRElOYZTk5TAbdjyaVCiY72pc/OosJqYEUlY/TeMfiBauxrn4vLrwdRR dFwSEWpLguhRvUphE2HlGoZ32Lzz7aC7Tu/LS4TsuoJYG0uZknU60TaczuvF5yhOM7IGqBOsVPfKk BfXM7kmiO5XVbubOsacyiA==; In-Reply-To: <8af271ae-f0da-4b7f-ba51-b68d9b67e8dd@gmail.com> (execvy@gmail.com) 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-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.bugs:298872 Archived-At: > Date: Fri, 10 Jan 2025 15:30:34 +0800 > From: execvy@gmail.com > > I try to reproduce on `emacs -Q` for this file: https://raw.githubusercontent.com/bitcoin/bitcoin/refs/heads/master/src/secp256k1/src/precomputed_ecmult.c > > It's fundamental-mode, then I notice `C-v` and `M-v` 's scroll-up and scroll-down have performance difference: C-v is more smoother than scroll-up. I've now tried that file in fundamental-mode, and I don't see any perceptible differences between C-v and M-v. For example, scrolling from top to bottom by leaning on C-v takes 35 sec, and scrolling bottom to top with M-v takes the same 35 sec. What is your auto-repeat rate for the keyboard? That is, if you press and hold C-v, how many key presses per second does your system produce?