From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: =?UTF-8?Q?Cl=c3=a9ment_Pit-Claudel?= Newsgroups: gmane.emacs.devel Subject: Re: Emacs Lisp JIT Compiler Date: Tue, 14 Aug 2018 20:21:49 -0400 Message-ID: <17e1d5ea-d8f7-9c94-979b-e89d119fe72c@gmail.com> References: <87va8ej4o1.fsf@tromey.com> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Trace: blaine.gmane.org 1534292517 29517 195.159.176.226 (15 Aug 2018 00:21:57 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Wed, 15 Aug 2018 00:21:57 +0000 (UTC) User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 To: Tom Tromey , emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Wed Aug 15 02:21:53 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 1fpjZQ-0007XX-Ip for ged-emacs-devel@m.gmane.org; Wed, 15 Aug 2018 02:21:52 +0200 Original-Received: from localhost ([::1]:46684 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fpjbW-0005Ob-OB for ged-emacs-devel@m.gmane.org; Tue, 14 Aug 2018 20:24:02 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:38537) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fpjak-0005O0-GA for emacs-devel@gnu.org; Tue, 14 Aug 2018 20:23:18 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fpjZq-0004u5-5x for emacs-devel@gnu.org; Tue, 14 Aug 2018 20:22:36 -0400 Original-Received: from mail-qt0-x22a.google.com ([2607:f8b0:400d:c0d::22a]:37861) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1fpjZX-0004Z6-BM for emacs-devel@gnu.org; Tue, 14 Aug 2018 20:22:13 -0400 Original-Received: by mail-qt0-x22a.google.com with SMTP id n6-v6so23146003qtl.4 for ; Tue, 14 Aug 2018 17:21:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:references:from:message-id:date:user-agent:mime-version :in-reply-to:content-language:content-transfer-encoding; bh=XnaYR2jS8XTYMInKFoZeh+mKQ7DN4BMg7sUuoEM3+8w=; b=BzgbXuS/NcI7T+L/IrDAuy9FEkd6dugNfa5YmXqHouVS9dKWo8TBCTksuPpIcjqMZL rL7st4ZGRvKva7/Nwpf7jjTJSEudT40LMXW5gNgVj0L0TmkQJDqPsFaS39U7yhjWY0e9 aCZmO2hhUOkJUWqjyP8LyeFfDaMLcLkjOG5LDAF2BRc72kBtGZqKel1r9B8qBpOAOIPh Ahhqgd96/AqZHlC+rtMIsl42RUfFTvrj3zcJz9Eqj4sjQ8nygWTuainiegy7Zw05GoB5 j8ZYH9KBcWWMoCWcPoyItb3P7ro8MmjXLGVRiuol6Ne1JV/wg723ZZf3IHFXVJNw3Z3m NBrw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=XnaYR2jS8XTYMInKFoZeh+mKQ7DN4BMg7sUuoEM3+8w=; b=TAcj5CpoZJvkWICboO+eKl+6HgT6xF/uGoYapcCdNsbcAPJ1ZbtuRPy74B6SkEBnPf buPCqz302FxwA7wZ+bPjDTrLiDxBw/wpsciiM/csvcHyXd5qtanQiXDBI8ao2Uofw7DQ wvXQyXbZbbf32CCvej1LQ4zYIWgKXaYv4jkaf8YKQRv3HGGgCzVqyNL+TDY4X0bwlYLa qCKDl5KWeJ9j3u2sl4f4lU0nSZxRp7vejgEx7p5dV3O0vusP/6+HeQ7YJ/DRONUh6CKC 6bEC4CPWEFoi2s10crEGZbEXUlCCInHMaTFoneYdrOQ3qHr8ck+PSFjs1V+zWvDVuZEy h8cw== X-Gm-Message-State: AOUpUlFVgWdja3MlRq/AEgmgjbfI2/uhkqYetZMopnQxrwu3JLmk5pd/ 9c4UmBbR4tyucGh2cIV7Pz/KZ287 X-Google-Smtp-Source: AA+uWPwk4bnFc0SPKTNQbhjZ+MkFaxMUMGTrVPt5ltrGpAjIJJymRF4IXv8/n3q2l2ZJx4WSXzkA/g== X-Received: by 2002:ac8:8d3:: with SMTP id y19-v6mr23105387qth.318.1534292510832; Tue, 14 Aug 2018 17:21:50 -0700 (PDT) Original-Received: from [18.26.2.123] (26-2-123.dynamic.csail.mit.edu. [18.26.2.123]) by smtp.gmail.com with ESMTPSA id 16-v6sm14668482qkd.93.2018.08.14.17.21.49 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 14 Aug 2018 17:21:49 -0700 (PDT) In-Reply-To: <87va8ej4o1.fsf@tromey.com> Content-Language: en-GB X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:400d:c0d::22a 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:228543 Archived-At: On 2018-08-13 00:01, Tom Tromey wrote: > Hi. I've written a JIT compiler for Emacs Lisp, and I'd like to check > it in. Hi Tom, This looks very promising! Thanks a lot :) I compiled and installed libjit, and things seem to build fine here. Benchmarking a simple loop yields an impressive 4x speedup (from 1 second down to 0.25s). However, benchmarking a larger application seems to yield a 30% slowdown (from 5.5s to 7.5s). I haven't investigated why yet. Have you seen similar variations? Cheers, Clément.