From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: Emacs Lisp JIT Compiler Date: Wed, 15 Aug 2018 20:47:51 +0300 Message-ID: <83pnyjiks8.fsf@gnu.org> References: <87va8ej4o1.fsf@tromey.com> <87mutpiyz6.fsf@tromey.com> <701cd05f423e0c46595a3010f45414d0.squirrel@dancol.org> <520f536b5a603831c9a57a5f6f0978a2.squirrel@dancol.org> <83va8binu8.fsf@gnu.org> NNTP-Posting-Host: blaine.gmane.org X-Trace: blaine.gmane.org 1534355178 9256 195.159.176.226 (15 Aug 2018 17:46:18 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Wed, 15 Aug 2018 17:46:18 +0000 (UTC) Cc: dancol@dancol.org, tom@tromey.com, emacs-devel@gnu.org To: Paul Eggert Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Wed Aug 15 19:46:14 2018 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 1fpzs5-0002Iq-U6 for ged-emacs-devel@m.gmane.org; Wed, 15 Aug 2018 19:46:14 +0200 Original-Received: from localhost ([::1]:50737 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fpzuC-0002gY-FB for ged-emacs-devel@m.gmane.org; Wed, 15 Aug 2018 13:48:24 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:35651) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fpztx-0002gN-3S for emacs-devel@gnu.org; Wed, 15 Aug 2018 13:48:13 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fpztm-0004us-KR for emacs-devel@gnu.org; Wed, 15 Aug 2018 13:48:04 -0400 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:52666) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fpztl-0004tt-Rf; Wed, 15 Aug 2018 13:47:58 -0400 Original-Received: from [176.228.60.248] (port=1992 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1fpztl-00029m-Ce; Wed, 15 Aug 2018 13:47:57 -0400 In-reply-to: (message from Paul Eggert on Wed, 15 Aug 2018 10:16:55 -0700) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2001:4830:134:3::e 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:228566 Archived-At: > From: Paul Eggert > Date: Wed, 15 Aug 2018 10:16:55 -0700 > Cc: dancol@dancol.org, tom@tromey.com, emacs-devel@gnu.org > > Besides, none of the JIT approaches we're talking about are free from the issues > Daniel raised: they all have significant performance differences on different > platforms. If we're going to reject a JIT approach merely because a 3x > performance improvement on one platform isn't equally shared by other platforms, > we might as well just be up front about it and say we're going to reject all JIT > approaches. The fact there are platform-specific differences in performance doesn't yet mean the differences are significant enough for us to reject all of the JIT libraries. We don't need to give up so quickly.