From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: Performance of lexical closures in interpreted code? (was Re: Execution speed) Date: Mon, 20 Mar 2017 09:12:37 -0400 Message-ID: References: <87lgs13wz2.fsf@users.sourceforge.net> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1490015681 23017 195.159.176.226 (20 Mar 2017 13:14:41 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Mon, 20 Mar 2017 13:14:41 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.0.50 (gnu/linux) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Mon Mar 20 14:14:37 2017 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cpx8i-0004HU-52 for ged-emacs-devel@m.gmane.org; Mon, 20 Mar 2017 14:14:24 +0100 Original-Received: from localhost ([::1]:32947 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cpx8o-0005eO-46 for ged-emacs-devel@m.gmane.org; Mon, 20 Mar 2017 09:14:30 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:49629) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cpx7K-0004TL-VQ for emacs-devel@gnu.org; Mon, 20 Mar 2017 09:12:59 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cpx7H-0002w5-HR for emacs-devel@gnu.org; Mon, 20 Mar 2017 09:12:58 -0400 Original-Received: from [195.159.176.226] (port=35953 helo=blaine.gmane.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1cpx7H-0002v6-8s for emacs-devel@gnu.org; Mon, 20 Mar 2017 09:12:55 -0400 Original-Received: from list by blaine.gmane.org with local (Exim 4.84_2) (envelope-from ) id 1cpx78-0003UT-Oq for emacs-devel@gnu.org; Mon, 20 Mar 2017 14:12:46 +0100 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 17 Original-X-Complaints-To: usenet@blaine.gmane.org Cancel-Lock: sha1:KeM7YSUEQzzun6DSymk/nO8CeoY= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 195.159.176.226 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 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" Xref: news.gmane.org gmane.emacs.devel:213177 Archived-At: > Yes and no: I consider the performance of interpreted code to be > basically irrelevant, so I haven't paid any attention to it when > introducing the lexical-binding functionality: when performance matters, > the code should be compiled. BTW, the above could give the impression that I wrote that code, but really the credit is due to Miles Bader (similarly, the changes in the byte-compiler were written by Igor Kuzmin (as part of a summer project under my supervision) rather than by me (Miles Bader had started on that front as well, but using another approach which did not lend itself to a summer project)). What I did do is "the finishing touches", so I basically only claim responsibility for the bugs, not the features. Stefan