From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Lars Ingebrigtsen Newsgroups: gmane.emacs.bugs Subject: bug#10539: 24.0.92; low display-time-interval makes Emacs slow Date: Sat, 23 Apr 2022 16:41:48 +0200 Message-ID: <87o80rrheb.fsf@gnus.org> References: <87zkdl93r0.fsf@web.de> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="35620"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) Cc: 10539@debbugs.gnu.org To: Michael Heerdegen Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Sat Apr 23 16:42:15 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 1niGxi-00092w-Pr for geb-bug-gnu-emacs@m.gmane-mx.org; Sat, 23 Apr 2022 16:42:14 +0200 Original-Received: from localhost ([::1]:57478 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1niGxh-0007jq-0f for geb-bug-gnu-emacs@m.gmane-mx.org; Sat, 23 Apr 2022 10:42:13 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:59278) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1niGxW-0007jf-4X for bug-gnu-emacs@gnu.org; Sat, 23 Apr 2022 10:42:02 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:34783) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1niGxV-000568-SJ for bug-gnu-emacs@gnu.org; Sat, 23 Apr 2022 10:42:01 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1niGxV-0002xL-Pb for bug-gnu-emacs@gnu.org; Sat, 23 Apr 2022 10:42:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Lars Ingebrigtsen Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 23 Apr 2022 14:42:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 10539 X-GNU-PR-Package: emacs Original-Received: via spool by 10539-submit@debbugs.gnu.org id=B10539.165072492011355 (code B ref 10539); Sat, 23 Apr 2022 14:42:01 +0000 Original-Received: (at 10539) by debbugs.gnu.org; 23 Apr 2022 14:42:00 +0000 Original-Received: from localhost ([127.0.0.1]:56913 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1niGxU-0002x5-FR for submit@debbugs.gnu.org; Sat, 23 Apr 2022 10:42:00 -0400 Original-Received: from quimby.gnus.org ([95.216.78.240]:50774) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1niGxS-0002wo-TJ for 10539@debbugs.gnu.org; Sat, 23 Apr 2022 10:41:59 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnus.org; s=20200322; h=Content-Type:MIME-Version:Message-ID:In-Reply-To:Date: References:Subject:Cc:To:From:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=hz431U+CL2YWjJuW1jju6Yjabv78flfJkbn9+3mcQsU=; b=bE4N/auw9KcR3TLJVKt8nB3iYZ sJc2teN7wPrjjVJVALbSraVqDxcOSOpLoMrabnMGuDUWF72w4M9ZffELmjXIgQG6VVqa/bcARgB8p nqDf4NkvLndubDZDIHSIUpWQhN9jb9/C/PfxBhpWbtj2wjCOhA03i+I6IVvpnaZXARPk=; Original-Received: from [84.212.220.105] (helo=xo) by quimby.gnus.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1niGxK-0005MA-KQ; Sat, 23 Apr 2022 16:41:52 +0200 X-Now-Playing: Liturgy's _Origin of the Alimonies_: "The Armistice" In-Reply-To: <87zkdl93r0.fsf@web.de> (Michael Heerdegen's message of "Wed, 18 Jan 2012 02:52:03 +0100") 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:230495 Archived-At: Michael Heerdegen writes: > The docstring of `display-time-interval' says "Seconds between updates > of time in the mode line.". Ok, fine. The doc of > `display-time-string-forms' includes an example which makes > `display-time-mode' show seconds. So, the user may think setting > `display-time-interval' to 1 is a good idea. > > But it is currently not, on the contrary. > > First of all, `display-time-update' is a long, complex function. > Running only its calculations every second consumes some percent CPU by > itself. (I'm going through old bug reports that unfortunately weren't resolved at the time.) I've tried this in Emacs 29, and the Emacs in question does not show up on "top" as consuming any CPU, so this has perhaps improved? > Second, the doc of `display-time-update' says > > Update the display-time info for the mode line. > However, don't redisplay right now. > > But it _does_ redisplay, it calls `force-mode-line-update' explicitly at > the end of the code! As noted in the bug thread, `force-mode-line-update' just sets some variables to make the next redisplay cycle update the mode lines, so the doc string is correct, I think. The discussion then went on to adding some more comments or something, but I'm not sure whether there's anything more to be done here? -- (domestic pets only, the antidote for overdose, milk.) bloggy blog: http://lars.ingebrigtsen.no