From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: Emacs-26.0.91: switch-to-buffer-other-window runs too slowly (about 0.1s) Date: Mon, 26 Mar 2018 18:16:48 +0300 Message-ID: <83efk6g93z.fsf@gnu.org> References: Reply-To: Eli Zaretskii NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Trace: blaine.gmane.org 1522078939 8645 195.159.176.226 (26 Mar 2018 15:42:19 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Mon, 26 Mar 2018 15:42:19 +0000 (UTC) Cc: emacs-devel@gnu.org To: zhang cc Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Mon Mar 26 17:42:15 2018 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1f0UGE-00029X-V6 for ged-emacs-devel@m.gmane.org; Mon, 26 Mar 2018 17:42:15 +0200 Original-Received: from localhost ([::1]:57466 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1f0UII-0002MT-9r for ged-emacs-devel@m.gmane.org; Mon, 26 Mar 2018 11:44:22 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:57472) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1f0TrV-0003ZX-Po for emacs-devel@gnu.org; Mon, 26 Mar 2018 11:16:42 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1f0TrS-0007CI-Kx for emacs-devel@gnu.org; Mon, 26 Mar 2018 11:16:41 -0400 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:45626) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1f0TrS-0007CC-IR; Mon, 26 Mar 2018 11:16:38 -0400 Original-Received: from [176.228.60.248] (port=2880 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1f0TrS-0001Bv-24; Mon, 26 Mar 2018 11:16:38 -0400 In-reply-to: (message from zhang cc on Mon, 26 Mar 2018 10:12:33 +0000) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2001:4830:134:3::e X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 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.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:224038 Archived-At: > From: zhang cc > Date: Mon, 26 Mar 2018 10:12:33 +0000 > > 1. start emacs with “emacs -Q” > 2. eval the following form: > (progn > (setq ddd-tm (current-time)) > (switch-to-buffer-other-window "*Messages*") > (message "ddd: %ss" (float-time (time-subtract (current-time) ddd-tm)))) > > The result is lager than 0.1s on my machine. This makes undo-tree running too slowly, because it calls > switch-to-buffer-other-window twice per undo. I cannot reproduce this. I get zero seconds. Does this happen in "emacs -Q -nw"?