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: Preview: portable dumper Date: Fri, 2 Dec 2016 15:42:26 -0800 Organization: UCLA Computer Science Department Message-ID: <59076862-6cc1-82d7-2ad6-5d06c032e15e@cs.ucla.edu> References: <047a67ec-9e29-7e4e-0fb0-24c3e59b5886@dancol.org> <83zikjxt1j.fsf@gnu.org> <8360n6ruzu.fsf@gnu.org> <834m2nplmb.fsf@gnu.org> <83inr2oje6.fsf@gnu.org> <83shq6mlt3.fsf@gnu.org> 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 1480722166 17930 195.159.176.226 (2 Dec 2016 23:42:46 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 2 Dec 2016 23:42:46 +0000 (UTC) User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 Cc: emacs-devel@gnu.org To: Stefan Monnier , Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sat Dec 03 00:42:42 2016 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 1cCxTW-0003yY-Fn for ged-emacs-devel@m.gmane.org; Sat, 03 Dec 2016 00:42:42 +0100 Original-Received: from localhost ([::1]:37021 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cCxTa-0007nI-9t for ged-emacs-devel@m.gmane.org; Fri, 02 Dec 2016 18:42:46 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:51263) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cCxTS-0007mA-Q7 for emacs-devel@gnu.org; Fri, 02 Dec 2016 18:42:39 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cCxTS-00063Y-3B for emacs-devel@gnu.org; Fri, 02 Dec 2016 18:42:38 -0500 Original-Received: from zimbra.cs.ucla.edu ([131.179.128.68]:35042) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1cCxTM-00061g-Ib; Fri, 02 Dec 2016 18:42:32 -0500 Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 52157160051; Fri, 2 Dec 2016 15:42:31 -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 uO8DOnhUjxze; Fri, 2 Dec 2016 15:42:30 -0800 (PST) Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 9A0BF16013D; Fri, 2 Dec 2016 15:42:30 -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 Zu_E7TBebnPJ; Fri, 2 Dec 2016 15:42:30 -0800 (PST) Original-Received: from Penguin.CS.UCLA.EDU (Penguin.CS.UCLA.EDU [131.179.64.200]) by zimbra.cs.ucla.edu (Postfix) with ESMTPSA id 89880160051; Fri, 2 Dec 2016 15:42:29 -0800 (PST) In-Reply-To: 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:209957 Archived-At: On 12/02/2016 06:51 AM, Stefan Monnier wrote: > I mean that bytecomp.el would generate a file in a format which > pdumper can use (which has various consequences, such as the fact that > .elc files aren't portable any more). The format could be easy for pdumper to use but still be portable. For example, the pdumper format could use 64-bit little-endian representation for Lisp_Object values, even on platforms with 32-bit or big-endian Lisp_Objects. Although this would complicate the pdumper and slow it down on platforms where the native format doesn't match the pdumper representation, the pdumper would still be significantly faster than lread.c.