From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#30539: 26.0; `char-displayable-p' is much slower in Emacs 25 and 26 Date: Fri, 23 Feb 2018 09:14:39 +0200 Message-ID: <834lm85g9s.fsf@gnu.org> References: <8c79c39f-7abb-4591-a676-17fb46af5a8f@default> <923b8123-937d-4ffb-9988-5359fdcbb6bc@default> <87woz44grg.fsf@gmail.com> <87tvu84c05.fsf@gmail.com> Reply-To: Eli Zaretskii NNTP-Posting-Host: blaine.gmane.org X-Trace: blaine.gmane.org 1519370174 20772 195.159.176.226 (23 Feb 2018 07:16:14 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 23 Feb 2018 07:16:14 +0000 (UTC) Cc: npostavs@gmail.com, 30539@debbugs.gnu.org To: Drew Adams Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Fri Feb 23 08:16:10 2018 Return-path: Envelope-to: geb-bug-gnu-emacs@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 1ep7aT-0004xU-Ba for geb-bug-gnu-emacs@m.gmane.org; Fri, 23 Feb 2018 08:16:09 +0100 Original-Received: from localhost ([::1]:42773 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ep7cU-0002PD-V7 for geb-bug-gnu-emacs@m.gmane.org; Fri, 23 Feb 2018 02:18:14 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:44020) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ep7bR-0002KO-9q for bug-gnu-emacs@gnu.org; Fri, 23 Feb 2018 02:18:10 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ep7aM-0002fw-WE for bug-gnu-emacs@gnu.org; Fri, 23 Feb 2018 02:17:08 -0500 Original-Received: from debbugs.gnu.org ([208.118.235.43]:49167) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1ep7aM-0002ex-Km for bug-gnu-emacs@gnu.org; Fri, 23 Feb 2018 02:16:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1ep7aM-00073x-DC for bug-gnu-emacs@gnu.org; Fri, 23 Feb 2018 02:16:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Fri, 23 Feb 2018 07:16:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 30539 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 30539-submit@debbugs.gnu.org id=B30539.151937012527097 (code B ref 30539); Fri, 23 Feb 2018 07:16:02 +0000 Original-Received: (at 30539) by debbugs.gnu.org; 23 Feb 2018 07:15:25 +0000 Original-Received: from localhost ([127.0.0.1]:57064 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1ep7Zl-00072z-3b for submit@debbugs.gnu.org; Fri, 23 Feb 2018 02:15:25 -0500 Original-Received: from eggs.gnu.org ([208.118.235.92]:49582) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1ep7Zj-00072n-Ap for 30539@debbugs.gnu.org; Fri, 23 Feb 2018 02:15:23 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ep7Yj-0008Li-LH for 30539@debbugs.gnu.org; Fri, 23 Feb 2018 02:15:17 -0500 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:54134) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ep7Yj-0008L7-BJ; Fri, 23 Feb 2018 02:14:21 -0500 Original-Received: from [176.228.60.248] (port=3050 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1ep7Yi-0008Pm-Ls; Fri, 23 Feb 2018 02:14:21 -0500 In-reply-to: (message from Drew Adams on Thu, 22 Feb 2018 20:07:09 -0800 (PST)) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] 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: 208.118.235.43 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:143617 Archived-At: > Date: Thu, 22 Feb 2018 20:07:09 -0800 (PST) > From: Drew Adams > Cc: 30539@debbugs.gnu.org > > > > Another question is whether this bug should/will affect all > > > users or only some? If the latter then I can let users > > > decide whether to test `char-displayable-p' (I have an > > > option for that anyway) or whether to bind > > > `inhibit-compacting-font-caches to `t'. If only some users > > > are affected by the bug, do we know why? Does it have to > > > do with the fonts they have installed, for example? > > > > Well, as I mentioned, I don't see it on my GNU/Linux box, so it's not > > universal. I would guess the fonts installed is the main factor. > > I googled a bit for that variable, and there are a bunch of > Emacs bugs and other posts about it. Seems like (to be > confirmed) it is a problem only for MS Windows (?), and > maybe only for TrueType fonts (?). AFAIR, this isn't seen only on Windows. And yes, only some fonts need this, if you have them installed.