From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Gregory Heytings via "Emacs development discussions." Newsgroups: gmane.emacs.devel Subject: Re: Script for compiling more quietly Date: Mon, 14 Dec 2020 17:41:05 +0000 Message-ID: References: <87czzg8b8v.fsf@gnus.org> <87y2i0310m.fsf@gnus.org> <838sa0crfn.fsf@gnu.org> <83zh2gbaeb.fsf@gnu.org> <87r1nsz5ux.fsf@gnus.org> Reply-To: Gregory Heytings Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="31035"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Alpine 2.22 (NEB 394 2020-01-19) Cc: Eli Zaretskii , monnier@iro.umontreal.ca, emacs-devel@gnu.org To: Lars Ingebrigtsen Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Mon Dec 14 18:43:23 2020 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 1korsY-0007yR-NZ for ged-emacs-devel@m.gmane-mx.org; Mon, 14 Dec 2020 18:43:22 +0100 Original-Received: from localhost ([::1]:50348 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1korsX-0003nP-IW for ged-emacs-devel@m.gmane-mx.org; Mon, 14 Dec 2020 12:43:21 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:35220) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1korqZ-0002UR-LA for emacs-devel@gnu.org; Mon, 14 Dec 2020 12:41:20 -0500 Original-Received: from mx.sdf.org ([205.166.94.24]:50206) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1korqV-0004w9-U9; Mon, 14 Dec 2020 12:41:19 -0500 Original-Received: from sdf.org (IDENT:ghe@faeroes.freeshell.org [205.166.94.9]) by mx.sdf.org (8.15.2/8.14.5) with ESMTPS id 0BEHf8uv021966 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits) verified NO); Mon, 14 Dec 2020 17:41:08 GMT Original-Received: (from ghe@localhost) by sdf.org (8.15.2/8.12.8/Submit) id 0BEHfkR8009745; Mon, 14 Dec 2020 17:41:47 GMT In-Reply-To: <87r1nsz5ux.fsf@gnus.org> Received-SPF: pass client-ip=205.166.94.24; envelope-from=ghe@sdf.org; helo=mx.sdf.org X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_PASS=-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:260822 Archived-At: >> In which case I don't understand why it is important to be accurate >> with the actual number of cores. You could just use 4 as the default. > > The default should be sensible, and the sensible default is "all the > cores". -j4 on a system with two cores would be slower than -j2. > BTW, I'm not sure the current formula is correct for a computer with multiple physical CPU's, each with multiple cores... but I don't have a computer with that configuration to check.