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.bugs Subject: Re: High run time variance Date: Tue, 30 Mar 2010 15:01:44 +0200 Message-ID: <8739ziynd3.fsf@gnu.org> References: <4BB0D0A7.7080505@gnu.org> <87vdce186i.fsf@gnu.org> <4BB1EFFD.4080206@gnu.org> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Trace: dough.gmane.org 1269954128 13600 80.91.229.12 (30 Mar 2010 13:02:08 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Tue, 30 Mar 2010 13:02:08 +0000 (UTC) Cc: bug-guile@gnu.org To: Luca Saiu Original-X-From: bug-guile-bounces+guile-bugs=m.gmane.org@gnu.org Tue Mar 30 15:02:04 2010 Return-path: Envelope-to: guile-bugs@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 1Nwb4z-0002ur-Em for guile-bugs@m.gmane.org; Tue, 30 Mar 2010 15:02:01 +0200 Original-Received: from localhost ([127.0.0.1]:56454 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Nwb4y-0001GJ-VU for guile-bugs@m.gmane.org; Tue, 30 Mar 2010 09:02:01 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1Nwb4q-0001G4-TR for bug-guile@gnu.org; Tue, 30 Mar 2010 09:01:52 -0400 Original-Received: from [140.186.70.92] (port=34468 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Nwb4o-0001Fw-FT for bug-guile@gnu.org; Tue, 30 Mar 2010 09:01:51 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1Nwb4m-0004Lj-AG for bug-guile@gnu.org; Tue, 30 Mar 2010 09:01:50 -0400 Original-Received: from mail3-relais-sop.national.inria.fr ([192.134.164.104]:35900) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1Nwb4m-0004LM-2U; Tue, 30 Mar 2010 09:01:48 -0400 X-IronPort-AV: E=Sophos;i="4.51,334,1267398000"; d="scan'208";a="47718179" Original-Received: from laptop-147-210-128-170.labri.fr (HELO nixey) ([147.210.128.170]) by mail3-relais-sop.national.inria.fr with ESMTP/TLS/DHE-RSA-AES128-SHA; 30 Mar 2010 15:01:46 +0200 X-URL: http://www.fdn.fr/~lcourtes/ X-Revolutionary-Date: 10 Germinal an 218 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 In-Reply-To: <4BB1EFFD.4080206@gnu.org> (Luca Saiu's message of "Tue, 30 Mar 2010 14:35:09 +0200") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux) X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-BeenThere: bug-guile@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Bug reports for GUILE, GNU's Ubiquitous Extension Language" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: bug-guile-bounces+guile-bugs=m.gmane.org@gnu.org Errors-To: bug-guile-bounces+guile-bugs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.lisp.guile.bugs:4548 Archived-At: Hello, Luca Saiu writes: > The effect is much weaker in either case, when using tail-recursive > functions. This is interesting. Another guess: it could be that the non-tail-recursive version fills the L2 cache (/sys/devices/system/cpu/cpu0/cache/index2/size says it=E2=80=99s = 2=C2=A0MiB on my laptop), or something like that. Thanks, Ludo=E2=80=99.