From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Paul Eggert Newsgroups: gmane.emacs.bugs Subject: bug#12450: Remove configure's --without-sync-input option. Date: Sat, 15 Sep 2012 20:15:36 -0700 Organization: UCLA Computer Science Department Message-ID: <50554458.6040308@cs.ucla.edu> References: <50543449.1070306@cs.ucla.edu> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Trace: ger.gmane.org 1347765364 32739 80.91.229.3 (16 Sep 2012 03:16:04 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 16 Sep 2012 03:16:04 +0000 (UTC) Cc: lekktu@gmail.com, 12450@debbugs.gnu.org To: rms@gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sun Sep 16 05:16:07 2012 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 1TD5L3-0007jd-PY for geb-bug-gnu-emacs@m.gmane.org; Sun, 16 Sep 2012 05:16:06 +0200 Original-Received: from localhost ([::1]:52555 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TD5Kz-00013z-2z for geb-bug-gnu-emacs@m.gmane.org; Sat, 15 Sep 2012 23:16:01 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:57243) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TD5Kw-00013f-AS for bug-gnu-emacs@gnu.org; Sat, 15 Sep 2012 23:15:59 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TD5Ku-0003aX-9u for bug-gnu-emacs@gnu.org; Sat, 15 Sep 2012 23:15:58 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:54757) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TD5Ku-0003aR-6M for bug-gnu-emacs@gnu.org; Sat, 15 Sep 2012 23:15:56 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.72) (envelope-from ) id 1TD5Lx-0002bE-UY for bug-gnu-emacs@gnu.org; Sat, 15 Sep 2012 23:17:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Paul Eggert Original-Sender: debbugs-submit-bounces@debbugs.gnu.org Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 16 Sep 2012 03:17:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 12450 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 12450-submit@debbugs.gnu.org id=B12450.13477654159976 (code B ref 12450); Sun, 16 Sep 2012 03:17:01 +0000 Original-Received: (at 12450) by debbugs.gnu.org; 16 Sep 2012 03:16:55 +0000 Original-Received: from localhost ([127.0.0.1]:36070 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.72) (envelope-from ) id 1TD5Lq-0002ar-Ln for submit@debbugs.gnu.org; Sat, 15 Sep 2012 23:16:54 -0400 Original-Received: from smtp.cs.ucla.edu ([131.179.128.62]:59464) by debbugs.gnu.org with esmtp (Exim 4.72) (envelope-from ) id 1TD5Lm-0002ai-R1 for 12450@debbugs.gnu.org; Sat, 15 Sep 2012 23:16:52 -0400 Original-Received: from localhost (localhost.localdomain [127.0.0.1]) by smtp.cs.ucla.edu (Postfix) with ESMTP id 6E86239E8016; Sat, 15 Sep 2012 20:15:43 -0700 (PDT) X-Virus-Scanned: amavisd-new at smtp.cs.ucla.edu Original-Received: from smtp.cs.ucla.edu ([127.0.0.1]) by localhost (smtp.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id VmGDaBgd-xDy; Sat, 15 Sep 2012 20:15:42 -0700 (PDT) Original-Received: from [192.168.1.3] (pool-108-23-119-2.lsanca.fios.verizon.net [108.23.119.2]) by smtp.cs.ucla.edu (Postfix) with ESMTPSA id 68D4D39E800E; Sat, 15 Sep 2012 20:15:42 -0700 (PDT) User-Agent: Mozilla/5.0 (X11; Linux i686; rv:15.0) Gecko/20120827 Thunderbird/15.0 In-Reply-To: X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.13 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 2) 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:64379 Archived-At: On 09/15/2012 03:18 PM, Richard Stallman wrote: > I have a vague memory that the sync input code had an important flaw > -- that for certain display-updating tasks (perhaps > mouse-highlighting) it could cause a delay until Emacs was read to > accept input, which the other code could do instantly. > > I don't know if this is true now, and I'm not sure of the memory at all. > But it would be good to investigate this question. Yes, that topic came up in 2008 when SYNC_INPUT was made the default on non-Windows hosts. That discussion concluded that it's not a problem in practice, because SYNC_INPUT does not postpone X11 event processing indefinitely; it postpones it only until the next QUIT or UNBLOCK_INPUT. Please see Stefan's comment in , along with the surrounding thread. The remaining issues noted in that thread all seem to have been fixed since then, for the SYNC_INPUT case.