From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Paul Eggert Newsgroups: gmane.emacs.devel Subject: Re: lexical-binding causes a lot more GC, why? Date: Fri, 30 Oct 2015 14:14:58 -0700 Organization: UCLA Computer Science Department Message-ID: <5633DDD2.9080900@cs.ucla.edu> References: NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Trace: ger.gmane.org 1446239801 13188 80.91.229.3 (30 Oct 2015 21:16:41 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 30 Oct 2015 21:16:41 +0000 (UTC) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Oct 30 22:16:33 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 1ZsH2G-0001TV-Rk for ged-emacs-devel@m.gmane.org; Fri, 30 Oct 2015 22:16:32 +0100 Original-Received: from localhost ([::1]:53201 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZsH2G-0004fo-B6 for ged-emacs-devel@m.gmane.org; Fri, 30 Oct 2015 17:16:32 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:55967) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZsH0p-0002hU-EQ for emacs-devel@gnu.org; Fri, 30 Oct 2015 17:15:07 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZsH0m-0003rR-9E for emacs-devel@gnu.org; Fri, 30 Oct 2015 17:15:03 -0400 Original-Received: from zimbra.cs.ucla.edu ([131.179.128.68]:60571) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZsH0m-0003qa-4C for emacs-devel@gnu.org; Fri, 30 Oct 2015 17:15:00 -0400 Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 199A3160193 for ; Fri, 30 Oct 2015 14:14:59 -0700 (PDT) Original-Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id ngEK_b4IQf-G for ; Fri, 30 Oct 2015 14:14:58 -0700 (PDT) Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 75FF0160E45 for ; Fri, 30 Oct 2015 14:14:58 -0700 (PDT) X-Virus-Scanned: amavisd-new at zimbra.cs.ucla.edu Original-Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id 4k7Osy8ksBB2 for ; Fri, 30 Oct 2015 14:14:58 -0700 (PDT) Original-Received: from Penguin.CS.UCLA.EDU (Penguin.CS.UCLA.EDU [131.179.64.200]) by zimbra.cs.ucla.edu (Postfix) with ESMTPSA id 5D712160193 for ; Fri, 30 Oct 2015 14:14:58 -0700 (PDT) User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.1.0 In-Reply-To: X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 131.179.128.68 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:192988 Archived-At: On 10/28/2015 08:12 AM, Le Wang wrote: > > I thought lexical-binding should always result in perf gains Isn't lexical binding implemented by passing around a list of bindings? That might explain the performance problems you see. (Sorry, I haven't looked at the actual code; this is just my vague recollection.)