From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ingo Molnar Subject: Re: [PATCH] lookup_object(): Speed up 'git gc' by 12%, by reducing hash chain length Date: Fri, 29 Apr 2011 11:50:45 +0200 Message-ID: <20110429095045.GA22919@elte.hu> References: <20110427213502.GA13647@elte.hu> <7vtydh1r3q.fsf@alter.siamese.dyndns.org> <20110429072604.GA16371@elte.hu> <20110429073825.GA16941@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: Junio C Hamano , git@vger.kernel.org, "Shawn O. Pearce" To: Sverre Rabbelier X-From: git-owner@vger.kernel.org Fri Apr 29 11:50:59 2011 Return-path: Envelope-to: gcvg-git-2@lo.gmane.org Received: from vger.kernel.org ([209.132.180.67]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1QFkLj-0002pJ-8B for gcvg-git-2@lo.gmane.org; Fri, 29 Apr 2011 11:50:59 +0200 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758158Ab1D2Jux convert rfc822-to-quoted-printable (ORCPT ); Fri, 29 Apr 2011 05:50:53 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:34394 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757972Ab1D2Juw (ORCPT ); Fri, 29 Apr 2011 05:50:52 -0400 Received: from elvis.elte.hu ([157.181.1.14]) by mx2.mail.elte.hu with esmtp (Exim) id 1QFkLY-0004Tm-1c from ; Fri, 29 Apr 2011 11:50:49 +0200 Received: by elvis.elte.hu (Postfix, from userid 1004) id 11EBC3E2516; Fri, 29 Apr 2011 11:50:46 +0200 (CEST) Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-08-17) Received-SPF: neutral (mx2.mail.elte.hu: 157.181.1.14 is neither permitted nor denied by domain of elte.hu) client-ip=157.181.1.14; envelope-from=mingo@elte.hu; helo=elvis.elte.hu; X-ELTE-SpamScore: -2.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-2.0 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.3.1 -2.0 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Archived-At: * Sverre Rabbelier wrote: > Heya, >=20 > On Fri, Apr 29, 2011 at 09:38, Ingo Molnar wrote: > > =A0 16: =A0 =A0 =A09,402,077,866 cycles:u =A0 =A0 =A0 =A0 =A0 =A0 =A0= =A0 # =A0 =A02.987 GHz =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0( +-= =A00.20% ) > > > > They are utterly unconvincing - there seems to be no improvement, i= t's all > > within noise. >=20 > Is this in a different repository from the one you ran the numbers on > initially, or did something else change to negate that 12.2% decrease= ? Yes, a newer Git repository with more objects in it. Thanks, Ingo