From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Andreas Schwab Newsgroups: gmane.emacs.devel Subject: Re: master 2c79a8f 2/2: Use posix_spawn if possible. Date: Sat, 02 Jan 2021 09:56:58 +0100 Message-ID: <87eej3wwbp.fsf@linux-m68k.org> References: <835z4qnhyx.fsf@gnu.org> <83y2hklqhg.fsf@gnu.org> <83wnx4lq3b.fsf@gnu.org> <86k0swut21.fsf@gmail.com> <861rf4nnuj.fsf@gmail.com> <83czyng78z.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="32315"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1.90 (gnu/linux) Cc: Andy Moreton , emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sat Jan 02 09:57:55 2021 Return-path: Envelope-to: ged-emacs-devel@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1kvcjT-0008K0-KM for ged-emacs-devel@m.gmane-mx.org; Sat, 02 Jan 2021 09:57:55 +0100 Original-Received: from localhost ([::1]:48614 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kvcjS-0003Hc-Ml for ged-emacs-devel@m.gmane-mx.org; Sat, 02 Jan 2021 03:57:54 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:34600) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kvcig-0002ql-9z for emacs-devel@gnu.org; Sat, 02 Jan 2021 03:57:06 -0500 Original-Received: from mail-out.m-online.net ([212.18.0.9]:40012) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kvcie-0006O6-4k; Sat, 02 Jan 2021 03:57:06 -0500 Original-Received: from frontend01.mail.m-online.net (unknown [192.168.8.182]) by mail-out.m-online.net (Postfix) with ESMTP id 4D7G3c6ZjKz1qs3s; Sat, 2 Jan 2021 09:57:00 +0100 (CET) Original-Received: from localhost (dynscan1.mnet-online.de [192.168.6.70]) by mail.m-online.net (Postfix) with ESMTP id 4D7G3c6DyQz1qs5K; Sat, 2 Jan 2021 09:57:00 +0100 (CET) X-Virus-Scanned: amavisd-new at mnet-online.de Original-Received: from mail.mnet-online.de ([192.168.8.182]) by localhost (dynscan1.mail.m-online.net [192.168.6.70]) (amavisd-new, port 10024) with ESMTP id mCAJlwKD3TlP; Sat, 2 Jan 2021 09:57:00 +0100 (CET) X-Auth-Info: W8kfrt1eufHcpIdixawvsp+RT4n/L0SL/iz8QfM/zOQBxPebcum2Wc6FdxtSInf9 Original-Received: from hase.home (ppp-46-244-172-221.dynamic.mnet-online.de [46.244.172.221]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.mnet-online.de (Postfix) with ESMTPSA; Sat, 2 Jan 2021 09:57:00 +0100 (CET) Original-Received: by hase.home (Postfix, from userid 1000) id 9429910140E; Sat, 2 Jan 2021 09:56:58 +0100 (CET) X-Yow: I call it a "SARDINE ON WHEAT"! In-Reply-To: <83czyng78z.fsf@gnu.org> (Eli Zaretskii's message of "Sat, 02 Jan 2021 08:53:00 +0200") Received-SPF: pass client-ip=212.18.0.9; envelope-from=whitebox@nefkom.net; helo=mail-out.m-online.net X-Spam_score_int: -22 X-Spam_score: -2.3 X-Spam_bar: -- X-Spam_report: (-2.3 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.249, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:262301 Archived-At: On Jan 02 2021, Eli Zaretskii wrote: >> From: Andy Moreton >> Date: Sat, 02 Jan 2021 01:12:36 +0000 >> >> > posix_spawn is supposed to be significantly faster than fork/exec on >> > macOS and Cygwin. >> >> Thanks Alan, useful info. However Philipp started with Linux, so there >> ought to also be something useful there that motivated these patches. I >> would be interested to learn what helps on Linux. > > AFAIK, the speedup also happens on GNU/Linux. Emacs already uses vfork, what else does posix_spawn give? Nothing, AFAICS. Andreas. -- Andreas Schwab, schwab@linux-m68k.org GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1 "And now for something completely different."