From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: [Emacs-diffs] master fbda511: Fix cps--gensym Date: Fri, 15 May 2015 14:19:55 -0400 Message-ID: References: <20150514032048.9882.50538@vcs.savannah.gnu.org> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1431714063 4064 80.91.229.3 (15 May 2015 18:21:03 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 15 May 2015 18:21:03 +0000 (UTC) Cc: emacs-devel@gnu.org To: Leo Liu Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri May 15 20:20:51 2015 Return-path: Envelope-to: ged-emacs-devel@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 1YtKE6-0003ij-B1 for ged-emacs-devel@m.gmane.org; Fri, 15 May 2015 20:20:50 +0200 Original-Received: from localhost ([::1]:60865 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YtKE5-0008Ry-EJ for ged-emacs-devel@m.gmane.org; Fri, 15 May 2015 14:20:49 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:55430) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YtKDj-0008Ri-AY for emacs-devel@gnu.org; Fri, 15 May 2015 14:20:28 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YtKDf-0007mh-SR for emacs-devel@gnu.org; Fri, 15 May 2015 14:20:27 -0400 Original-Received: from mercure.iro.umontreal.ca ([132.204.24.67]:43743) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YtKDf-0007md-O2 for emacs-devel@gnu.org; Fri, 15 May 2015 14:20:23 -0400 Original-Received: from hidalgo.iro.umontreal.ca (hidalgo.iro.umontreal.ca [132.204.27.50]) by mercure.iro.umontreal.ca (Postfix) with ESMTP id 49D2985FF1; Fri, 15 May 2015 14:20:19 -0400 (EDT) Original-Received: from lechon.iro.umontreal.ca (lechon.iro.umontreal.ca [132.204.27.242]) by hidalgo.iro.umontreal.ca (Postfix) with ESMTP id 130DF1E5B96; Fri, 15 May 2015 14:19:56 -0400 (EDT) Original-Received: by lechon.iro.umontreal.ca (Postfix, from userid 20848) id EAD78B409F; Fri, 15 May 2015 14:19:55 -0400 (EDT) In-Reply-To: (Leo Liu's message of "Fri, 15 May 2015 12:42:58 +0800") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux) X-DIRO-MailScanner-Information: Please contact the ISP for more information X-DIRO-MailScanner: Found to be clean X-DIRO-MailScanner-SpamCheck: n'est pas un polluriel, SpamAssassin (score=-2.82, requis 5, autolearn=not spam, ALL_TRUSTED -2.82, MC_TSTLAST 0.00) X-DIRO-MailScanner-From: monnier@iro.umontreal.ca X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-Received-From: 132.204.24.67 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 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.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:186517 Archived-At: >> format is already significantly more expensive than make-symbol, so >> obviously, make-symbol + format will be even worse. > OK but this doesn't impact runtime, right? All the hard work will be > done in compile time. No, it only impacts the macroexpansion time/space. But the point is that if you don't care about that, then you should use the cl-gensym version. The make-symbol version is the "fast path", so making it fat&slow makes no sense. Stefan