From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: ludo@gnu.org (Ludovic =?iso-8859-1?Q?Court=E8s?=) Newsgroups: gmane.lisp.guile.devel Subject: Re: GLIL->C compilation Date: Sat, 20 Nov 2010 00:56:19 +0100 Message-ID: <87mxp4vpek.fsf@gnu.org> References: <201010212223.23822.stefan.itampe@gmail.com> <201011052219.54556.stefan.itampe@gmail.com> <87zkt4vrhn.fsf_-_@gnu.org> <201011200020.04169.stefan.itampe@gmail.com> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Trace: dough.gmane.org 1290211010 19120 80.91.229.12 (19 Nov 2010 23:56:50 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Fri, 19 Nov 2010 23:56:50 +0000 (UTC) To: guile-devel@gnu.org Original-X-From: guile-devel-bounces+guile-devel=m.gmane.org@gnu.org Sat Nov 20 00:56:46 2010 Return-path: Envelope-to: guile-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1PJaov-0008SY-V3 for guile-devel@m.gmane.org; Sat, 20 Nov 2010 00:56:46 +0100 Original-Received: from localhost ([127.0.0.1]:35013 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1PJaov-0005Ij-IV for guile-devel@m.gmane.org; Fri, 19 Nov 2010 18:56:45 -0500 Original-Received: from [140.186.70.92] (port=56408 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1PJaon-0005IU-Ux for guile-devel@gnu.org; Fri, 19 Nov 2010 18:56:38 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1PJaom-0000uj-Pf for guile-devel@gnu.org; Fri, 19 Nov 2010 18:56:37 -0500 Original-Received: from lo.gmane.org ([80.91.229.12]:34241) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1PJaom-0000uM-CC for guile-devel@gnu.org; Fri, 19 Nov 2010 18:56:36 -0500 Original-Received: from list by lo.gmane.org with local (Exim 4.69) (envelope-from ) id 1PJaok-0008Nt-Oh for guile-devel@gnu.org; Sat, 20 Nov 2010 00:56:34 +0100 Original-Received: from yoda.fdn.fr ([80.67.169.18]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 20 Nov 2010 00:56:34 +0100 Original-Received: from ludo by yoda.fdn.fr with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 20 Nov 2010 00:56:34 +0100 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 46 Original-X-Complaints-To: usenet@dough.gmane.org X-Gmane-NNTP-Posting-Host: yoda.fdn.fr X-URL: http://www.fdn.fr/~lcourtes/ X-Revolutionary-Date: 30 Brumaire an 219 de la =?iso-8859-1?Q?R=E9volution?= X-PGP-Key-ID: 0xEA52ECF4 X-PGP-Key: http://www.fdn.fr/~lcourtes/ludovic.asc X-PGP-Fingerprint: 83C4 F8E5 10A3 3B4C 5BEA D15D 77DD 95E2 EA52 ECF4 X-OS: x86_64-unknown-linux-gnu User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.2 (gnu/linux) Cancel-Lock: sha1:pYmbtMMx0V8Q3cqnhFqcN9tnJek= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-BeenThere: guile-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Developers list for Guile, the GNU extensibility library" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: guile-devel-bounces+guile-devel=m.gmane.org@gnu.org Errors-To: guile-devel-bounces+guile-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.lisp.guile.devel:11150 Archived-At: Stefan Israelsson Tampe writes: > On Saturday, November 20, 2010 12:11:16 am Ludovic Courtès wrote: >> Hi, >> >> Stefan Israelsson Tampe writes: >> > #include "cfkn.h" >> > #define LOCAL_REF(i) fp[i] >> > #define LOCAL_SET(i,v) fp[i] = (v) >> > void cfkn3676(SCM *fp, SCM **spp) >> > { >> > >> > /* setup of environment */ >> > SCM *objects, *free, program, *sp, sss[100]; >> > sp = sss; >> > program = fp[-1]; >> > objects = SCM_I_VECTOR_WELTS (SCM_PROGRAM_OBJTABLE (program)); >> > free = SCM_PROGRAM_FREE_VARIABLES(program); >> > /* compiled section */ >> > >> > LCASE3666: >> > goto L3668; >> > LCASE3665: >> > sp++; *sp = LOCAL_REF(1); >> > sp++; *sp = SCM_I_MAKINUM(0); >> > sp-=2; if(!scm_is_eq(sp[1],sp[2])) goto L3669; >> > sp++; *sp = LOCAL_REF(2); >> >> [...] >> >> Comparing this to the VM’s bytecode interpreter should show the overhead >> incurred by instruction dispatch. >> >> Did you try to measure this? That’d be interesting. >> >> Thanks, >> Ludo’. > > Yes on one of my machine one loop takes about 6ns for the compiled one and > about 50ns for the bytcode, say a factor of 7-10 for simple tasks, but > remember > this is for rather trivial work. Woow, I didn’t expect so much. Ludo’.