From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#19266: 24.4; Font-related window redrawing delays on OS X Date: Thu, 04 Dec 2014 10:03:20 +0200 Message-ID: <83wq674zav.fsf@gnu.org> References: <83y4qn50ua.fsf@gnu.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1417680272 2749 80.91.229.3 (4 Dec 2014 08:04:32 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 4 Dec 2014 08:04:32 +0000 (UTC) Cc: 19266@debbugs.gnu.org To: Kirill Ignatiev Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Thu Dec 04 09:04:21 2014 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1XwROf-0002Nq-MG for geb-bug-gnu-emacs@m.gmane.org; Thu, 04 Dec 2014 09:04:21 +0100 Original-Received: from localhost ([::1]:44847 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XwROd-0005tV-3t for geb-bug-gnu-emacs@m.gmane.org; Thu, 04 Dec 2014 03:04:19 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:57219) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XwROT-0005tN-Ac for bug-gnu-emacs@gnu.org; Thu, 04 Dec 2014 03:04:15 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XwRON-0004Kj-4O for bug-gnu-emacs@gnu.org; Thu, 04 Dec 2014 03:04:09 -0500 Original-Received: from debbugs.gnu.org ([140.186.70.43]:56001) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XwRON-0004Kf-0U for bug-gnu-emacs@gnu.org; Thu, 04 Dec 2014 03:04:03 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1XwROM-0006uL-GN for bug-gnu-emacs@gnu.org; Thu, 04 Dec 2014 03:04:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 04 Dec 2014 08:04:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 19266 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 19266-submit@debbugs.gnu.org id=B19266.141768019126491 (code B ref 19266); Thu, 04 Dec 2014 08:04:02 +0000 Original-Received: (at 19266) by debbugs.gnu.org; 4 Dec 2014 08:03:11 +0000 Original-Received: from localhost ([127.0.0.1]:53214 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1XwRNX-0006tD-EN for submit@debbugs.gnu.org; Thu, 04 Dec 2014 03:03:11 -0500 Original-Received: from mtaout22.012.net.il ([80.179.55.172]:34324) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1XwRNU-0006t3-FG for 19266@debbugs.gnu.org; Thu, 04 Dec 2014 03:03:09 -0500 Original-Received: from conversion-daemon.a-mtaout22.012.net.il by a-mtaout22.012.net.il (HyperSendmail v2007.08) id <0NG100D00SXYWL00@a-mtaout22.012.net.il> for 19266@debbugs.gnu.org; Thu, 04 Dec 2014 10:03:07 +0200 (IST) Original-Received: from HOME-C4E4A596F7 ([87.69.4.28]) by a-mtaout22.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0NG100D56T16G4B0@a-mtaout22.012.net.il>; Thu, 04 Dec 2014 10:03:07 +0200 (IST) In-reply-to: X-012-Sender: halo1@inter.net.il X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 140.186.70.43 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-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:96846 Archived-At: > Date: Thu, 4 Dec 2014 02:41:34 -0500 > From: Kirill Ignatiev > Cc: 19266@debbugs.gnu.org > > > AFAICT, these delays are due to Emacs searching the system for > > appropriate fonts needed to display those unusual symbols. > > I understand that this needs to happen once. It can happen once for each portion of a buffer that was not yet displayed. > The description of what triggers the delays is unclear because for me > it's only reproducible incidentally, during normal work. I have > fold-mode that hides large portions of text, and a number of frames. > If I hide some previously-displayed text, go work in another frame, > then come back and unhide the text, then there is the font-searching > delay. Something similar happens if I switch to a different buffer, > then some time later switch back. Emacs releases unused font slots from time to time, which might be the reason here. But this is speculation; a reproducible recipe is required to investigate and come up with specifics. And yes, it could be a bug. > Is it reasonable to expect to keep all recently used fonts in memory > and not search for them again? For some value of "recently", yes. Again, more data is needed to determine whether this is an Emacs bug or a system configuration issue.