From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stephen Leake Newsgroups: gmane.emacs.bugs Subject: bug#18626: 24.3.94; communication with subprocess is slow Date: Sun, 05 Oct 2014 08:20:47 -0500 Message-ID: <858ukuejps.fsf@stephe-leake.org> References: <85wq8ge3gr.fsf@stephe-leake.org> <83oatsgswd.fsf@gnu.org> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1412515491 1910 80.91.229.3 (5 Oct 2014 13:24:51 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 5 Oct 2014 13:24:51 +0000 (UTC) Cc: 18626@debbugs.gnu.org To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sun Oct 05 15:24:42 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 1Xalnm-0003pn-N9 for geb-bug-gnu-emacs@m.gmane.org; Sun, 05 Oct 2014 15:24:42 +0200 Original-Received: from localhost ([::1]:47491 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XalkW-0004j9-F1 for geb-bug-gnu-emacs@m.gmane.org; Sun, 05 Oct 2014 09:21:20 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:57810) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XalkN-0004im-BY for bug-gnu-emacs@gnu.org; Sun, 05 Oct 2014 09:21:17 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XalkF-0004Hv-9q for bug-gnu-emacs@gnu.org; Sun, 05 Oct 2014 09:21:11 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:41999) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XalkF-0004Hq-6g for bug-gnu-emacs@gnu.org; Sun, 05 Oct 2014 09:21:03 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1XalkE-0003pQ-QT for bug-gnu-emacs@gnu.org; Sun, 05 Oct 2014 09:21:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Stephen Leake Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 05 Oct 2014 13:21:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 18626 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 18626-submit@debbugs.gnu.org id=B18626.141251525614693 (code B ref 18626); Sun, 05 Oct 2014 13:21:02 +0000 Original-Received: (at 18626) by debbugs.gnu.org; 5 Oct 2014 13:20:56 +0000 Original-Received: from localhost ([127.0.0.1]:33563 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Xalk7-0003ou-Jj for submit@debbugs.gnu.org; Sun, 05 Oct 2014 09:20:56 -0400 Original-Received: from dnvrco-outbound-snat.email.rr.com ([107.14.73.230]:15564 helo=dnvrco-oedge-vip.email.rr.com) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Xalk1-0003oh-SO for 18626@debbugs.gnu.org; Sun, 05 Oct 2014 09:20:53 -0400 Original-Received: from [70.94.38.149] ([70.94.38.149:49533] helo=TAKVER) by dnvrco-oedge02 (envelope-from ) (ecelerity 3.5.0.35861 r(Momo-dev:tip)) with ESMTP id 57/AF-08316-FA541345; Sun, 05 Oct 2014 13:20:48 +0000 In-Reply-To: <83oatsgswd.fsf@gnu.org> (Eli Zaretskii's message of "Sat, 04 Oct 2014 11:07:14 +0300") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (windows-nt) X-RR-Connecting-IP: 107.14.64.130:25 X-Authority-Analysis: v=2.1 cv=ReIeCjdv c=1 sm=1 tr=0 a=AppmJ/7ZOOFWL/q6u6u93g==:117 a=AppmJ/7ZOOFWL/q6u6u93g==:17 a=ayC55rCoAAAA:8 a=9XSUBuVRJI8A:10 a=o_R75loqY_IA:10 a=9i_RQKNPAAAA:8 a=mDV3o1hIAAAA:8 a=wi5yxs08qe8tc_r_UQEA:9 a=ii61gXl28gQA:10 X-Cloudmark-Score: 0 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:94159 Archived-At: Eli Zaretskii writes: > Can you present similar timings from some Posix platform for > comparison? On Debian wheezy, with emacs 24.3.94: $ cd /tmp $ time cat < /home/Projects/emacs/emacs-24.3.94/src/xdisp.c > xdisp.c real 0m0.007s user 0m0.000s sys 0m0.004s (find-file "emacs-24.3.94/src/xdisp.c") (pipe-torture "cat.exe") 1.556597 much faster than Windows, but still slow relative to plain file IO. (pipe-torture "debug.exe" "4096") This dies, because "debug.exe" exits early. It turns out that Emacs is sending one line of the buffer at a time. I have not yet tried to figure out why that doesn't happen on Windows. (find-file "emacs-24.3.94/src/xdisp.c") (pipe-torture-read "/Projects/emacs/emacs-24.3.94/src/xdisp.c") 0.077341 much faster than Windows, 10 times slower than file IO. >> Doing (setq process-adaptive-read-buffering nil) did not change the >> timing. > > AFAIK, this variable only matters for reading the subprocess output. > Since you didn't present the results for that, there's no evidence yet > which would support this conclusion. Right; process-adaptive-read-buffering should only affect pipe-torture-read. On Windows: (find-file "emacs-24.3.94/src/xdisp.c") (pipe-torture-read "/Projects/emacs/emacs-24.3.94/src/xdisp.c") process-adaptive-read-buffering t: 11.997684 process-adaptive-read-buffering nil: 12.012685 process-adaptive-read-buffering has no effect. Simililary, on Debian, process-adaptive-read-buffering has no effect. -- -- Stephe