From mboxrd@z Thu Jan  1 00:00:00 1970
Path: main.gmane.org!not-for-mail
From: "Eli Zaretskii" <eliz@elta.co.il>
Newsgroups: gmane.emacs.devel
Subject: Re: Fix for slow process output processing (please test).
Date: Mon, 05 Jan 2004 21:09:50 +0200
Sender: emacs-devel-bounces+emacs-devel=quimby.gnus.org@gnu.org
Message-ID: <2914-Mon05Jan2004210950+0200-eliz@elta.co.il>
References: <m3zndtimlc.fsf@kfs-l.imdomain.dk>	<87y8so7kjy.fsf@offby1.atm01.sea.blarg.net>	<m3oetjtjxi.fsf@kfs-l.imdomain.dk>
	<x5y8smmlr9.fsf@lola.goethe.zz>
Reply-To: Eli Zaretskii <eliz@elta.co.il>
NNTP-Posting-Host: deer.gmane.org
X-Trace: sea.gmane.org 1073330795 5288 80.91.224.253 (5 Jan 2004 19:26:35 GMT)
X-Complaints-To: usenet@sea.gmane.org
NNTP-Posting-Date: Mon, 5 Jan 2004 19:26:35 +0000 (UTC)
Cc: offby1@blarg.net, emacs-devel@gnu.org
Original-X-From: emacs-devel-bounces+emacs-devel=quimby.gnus.org@gnu.org Mon Jan 05 20:26:31 2004
Return-path: <emacs-devel-bounces+emacs-devel=quimby.gnus.org@gnu.org>
Original-Received: from quimby.gnus.org ([80.91.224.244])
	by deer.gmane.org with esmtp (Exim 3.35 #1 (Debian))
	id 1AdaMx-0006Vt-00
	for <emacs-devel@deer.gmane.org>; Mon, 05 Jan 2004 20:26:31 +0100
Original-Received: from monty-python.gnu.org ([199.232.76.173])
	by quimby.gnus.org with esmtp (Exim 3.35 #1 (Debian))
	id 1AdaMx-00058i-00
	for <emacs-devel@quimby.gnus.org>; Mon, 05 Jan 2004 20:26:31 +0100
Original-Received: from localhost ([127.0.0.1] helo=monty-python.gnu.org)
	by monty-python.gnu.org with esmtp (Exim 4.24)
	id 1Adb95-0002Wi-Ku
	for emacs-devel@quimby.gnus.org; Mon, 05 Jan 2004 15:16:15 -0500
Original-Received: from list by monty-python.gnu.org with tmda-scanned (Exim 4.24)
	id 1Adb7o-0002Km-2q
	for emacs-devel@gnu.org; Mon, 05 Jan 2004 15:14:56 -0500
Original-Received: from mail by monty-python.gnu.org with spam-scanned (Exim 4.24)
	id 1Adb7A-00028B-H8
	for emacs-devel@gnu.org; Mon, 05 Jan 2004 15:14:48 -0500
Original-Received: from [192.114.186.23] (helo=aragorn.inter.net.il)
	by monty-python.gnu.org with esmtp (Exim 4.24)
	id 1Adb74-00026C-Gj; Mon, 05 Jan 2004 15:14:10 -0500
Original-Received: from zaretski ([80.230.142.253])
	by aragorn.inter.net.il (Mirapoint Messaging Server MOS 3.3.8-GR)
	with ESMTP id CEP46200; Mon, 5 Jan 2004 21:12:31 +0200 (IST)
Original-To: David Kastrup <dak@gnu.org>
X-Mailer: emacs 21.3.50 (via feedmail 8 I) and Blat ver 1.8.9
In-reply-to: <x5y8smmlr9.fsf@lola.goethe.zz> (message from David Kastrup on 05
	Jan 2004 16:57:14 +0100)
X-BeenThere: emacs-devel@gnu.org
X-Mailman-Version: 2.1.2
Precedence: list
List-Id: Emacs development discussions.  <emacs-devel.gnu.org>
List-Unsubscribe: <http://mail.gnu.org/mailman/listinfo/emacs-devel>,
	<mailto:emacs-devel-request@gnu.org?subject=unsubscribe>
List-Archive: <http://mail.gnu.org/pipermail/emacs-devel>
List-Post: <mailto:emacs-devel@gnu.org>
List-Help: <mailto:emacs-devel-request@gnu.org?subject=help>
List-Subscribe: <http://mail.gnu.org/mailman/listinfo/emacs-devel>,
	<mailto:emacs-devel-request@gnu.org?subject=subscribe>
Errors-To: emacs-devel-bounces+emacs-devel=quimby.gnus.org@gnu.org
Xref: main.gmane.org gmane.emacs.devel:19020
X-Report-Spam: http://spam.gmane.org/gmane.emacs.devel:19020

> From: David Kastrup <dak@gnu.org>
> Date: 05 Jan 2004 16:57:14 +0100
> > 
> > I suppose that process-adaptive-read-buffering isn't really needed
> > on Windows,
> 
> Since Windows is slow, anyway?

I think the reason is that Windows never feeds Emacs with such small
chunks from a pipe.

> I suppose the problem could be that the Windows equivalent of
> "select" that Emacs uses does a busy wait without yielding the CPU.

I think that's not true: it does yield the CPU.  See w32proc.c:sys_select.