From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Paul Eggert Newsgroups: gmane.emacs.devel Subject: Re: [EXPERIMENT] Emacs with the SpiderMonkey garbage collector Date: Sat, 25 Nov 2017 20:20:53 -0800 Organization: UCLA Computer Science Department Message-ID: <9d7be625-85ae-54d5-3897-6f701c8ea124@cs.ucla.edu> References: NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Trace: blaine.gmane.org 1511670094 24519 195.159.176.226 (26 Nov 2017 04:21:34 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sun, 26 Nov 2017 04:21:34 +0000 (UTC) User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.4.0 Cc: emacs-devel@gnu.org To: Stefan Monnier , Pip Cet Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sun Nov 26 05:21:23 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 1eIoRI-000428-M3 for ged-emacs-devel@m.gmane.org; Sun, 26 Nov 2017 05:21:08 +0100 Original-Received: from localhost ([::1]:55205 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eIoRG-0007R2-Qo for ged-emacs-devel@m.gmane.org; Sat, 25 Nov 2017 23:21:06 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:53627) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eIoRA-0007Qi-5j for emacs-devel@gnu.org; Sat, 25 Nov 2017 23:21:00 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eIoR6-0002gU-7q for emacs-devel@gnu.org; Sat, 25 Nov 2017 23:21:00 -0500 Original-Received: from zimbra.cs.ucla.edu ([131.179.128.68]:53544) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eIoR6-0002fl-1T for emacs-devel@gnu.org; Sat, 25 Nov 2017 23:20:56 -0500 Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 165B1161280; Sat, 25 Nov 2017 20:20:54 -0800 (PST) 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 N6q9UHkwn1yC; Sat, 25 Nov 2017 20:20:53 -0800 (PST) Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 5F550161294; Sat, 25 Nov 2017 20:20:53 -0800 (PST) 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 uO7thIl_KucG; Sat, 25 Nov 2017 20:20:53 -0800 (PST) Original-Received: from [192.168.1.9] (unknown [47.154.30.119]) by zimbra.cs.ucla.edu (Postfix) with ESMTPSA id 3DDCE16127F; Sat, 25 Nov 2017 20:20:53 -0800 (PST) In-Reply-To: Content-Language: en-US X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] X-Received-From: 131.179.128.68 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:220457 Archived-At: Stefan Monnier wrote: > A moving GC is not necessarily better. It's a popular choice in > languages with high allocation rates, because allocation is extremely > efficient (just move the allocation pointer forward) and because > a stop© of the youngest generation can usually recover a lot of > garbage with fairly little effort (because often there are much fewer > live objects in the young region than dead ones, so copying the live > objects is cheaper than (mark&)sweeping the dead ones). > > But it's not like it doesn't have downsides. ... and then you stopped writing! Just when you were getting to the good part!