From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: remove-duplicates performances Date: Fri, 20 May 2011 13:14:03 -0300 Message-ID: References: <877h9lv5tl.fsf@gmail.com> <87tycpcu6t.fsf@gmail.com> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable X-Trace: dough.gmane.org 1305908058 19682 80.91.229.12 (20 May 2011 16:14:18 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Fri, 20 May 2011 16:14:18 +0000 (UTC) Cc: emacs-devel@gnu.org To: Thierry Volpiatto Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri May 20 18:14:14 2011 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([140.186.70.17]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1QNSL8-0000EU-I6 for ged-emacs-devel@m.gmane.org; Fri, 20 May 2011 18:14:14 +0200 Original-Received: from localhost ([::1]:48277 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QNSL7-0008Hy-VR for ged-emacs-devel@m.gmane.org; Fri, 20 May 2011 12:14:13 -0400 Original-Received: from eggs.gnu.org ([140.186.70.92]:54041) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QNSL2-0008Hf-CA for emacs-devel@gnu.org; Fri, 20 May 2011 12:14:12 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1QNSL1-0004h8-B5 for emacs-devel@gnu.org; Fri, 20 May 2011 12:14:08 -0400 Original-Received: from fencepost.gnu.org ([140.186.70.10]:53996) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QNSL1-0004h4-9q for emacs-devel@gnu.org; Fri, 20 May 2011 12:14:07 -0400 Original-Received: from 213-159-126-200.fibertel.com.ar ([200.126.159.213]:42666 helo=ceviche.home) by fencepost.gnu.org with esmtpsa (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1QNSL0-0005Zo-Sy; Fri, 20 May 2011 12:14:07 -0400 Original-Received: by ceviche.home (Postfix, from userid 20848) id 338246610B; Fri, 20 May 2011 13:14:03 -0300 (ART) In-Reply-To: <87tycpcu6t.fsf@gmail.com> (Thierry Volpiatto's message of "Fri, 20 May 2011 16:39:38 +0200") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (gnu/linux) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-Received-From: 140.186.70.10 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 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-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:139556 Archived-At: > I go down to a list of 10 elements and it still faster: I'm not surprised the break-even is less than 10. > liste de 2X10 =E9l=E9ments: > remove-duplicates 1 0.000209 0.000209 > remove-dups 1 3.6e-05 3.6e-05 > liste de 2X5 =E9l=E9ments: > remove-duplicates 1 7.3e-05 7.3e-05 > remove-dups 1 6.4e-05 6.4e-05 Hmm... so it's faster to do it for 20 than for 10? I expect it is common to call remove-duplicates with very short lists (shorter than 10 for sure) that present (almost) no duplication. Stefan