From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Shawn O. Pearce" Subject: Re: how to speed up "git log"? Date: Mon, 12 Feb 2007 01:22:24 -0500 Message-ID: <20070212062224.GD699@spearce.org> References: <200702111252.28393.bruno@clisp.org> <200702120041.27419.bruno@clisp.org> <200702120059.17676.robin.rosenberg.lists@dewire.com> <7vmz3kaugq.fsf@assigned-by-dhcp.cox.net> <20070212060641.GC699@spearce.org> <7vmz3jaorx.fsf@assigned-by-dhcp.cox.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Robin Rosenberg , Bruno Haible , Johannes Schindelin , git@vger.kernel.org To: Junio C Hamano X-From: git-owner@vger.kernel.org Mon Feb 12 07:22:42 2007 Return-path: Envelope-to: gcvg-git@gmane.org Received: from vger.kernel.org ([209.132.176.167]) by lo.gmane.org with esmtp (Exim 4.50) id 1HGUaH-00042y-5G for gcvg-git@gmane.org; Mon, 12 Feb 2007 07:22:41 +0100 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933028AbXBLGWf (ORCPT ); Mon, 12 Feb 2007 01:22:35 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933029AbXBLGWe (ORCPT ); Mon, 12 Feb 2007 01:22:34 -0500 Received: from corvette.plexpod.net ([64.38.20.226]:35712 "EHLO corvette.plexpod.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933028AbXBLGWd (ORCPT ); Mon, 12 Feb 2007 01:22:33 -0500 Received: from cpe-74-70-48-173.nycap.res.rr.com ([74.70.48.173] helo=asimov.home.spearce.org) by corvette.plexpod.net with esmtpa (Exim 4.63) (envelope-from ) id 1HGUa2-0003zl-Im; Mon, 12 Feb 2007 01:22:26 -0500 Received: by asimov.home.spearce.org (Postfix, from userid 1000) id BFE9620FBAE; Mon, 12 Feb 2007 01:22:24 -0500 (EST) Content-Disposition: inline In-Reply-To: <7vmz3jaorx.fsf@assigned-by-dhcp.cox.net> User-Agent: Mutt/1.5.11 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - corvette.plexpod.net X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [0 0] / [47 12] X-AntiAbuse: Sender Address Domain - spearce.org X-Source: X-Source-Args: X-Source-Dir: Sender: git-owner@vger.kernel.org Precedence: bulk X-Mailing-List: git@vger.kernel.org Archived-At: Junio C Hamano wrote: > "Shawn O. Pearce" writes: > > So I ran three trials, v1.5.0-rc4-26-gcc46a74 with and without > > NO_MMAP against v1.4.4.4 on a freshly repacked git.git. > > I do not think freshly repacked git.git is a good test case for > a real-world workload where this really matters. Doesn't your > default pack window large enough to cover it with a single > window, or perhaps two at most? Its one window, maybe two, as git.git is ~12 MiB and the window size is 1 MiB (NO_MMAP) or 32 MiB (with mmap). On linux.git: v150-mmap: 2.23 real 1.99 user 0.10 sys 2.19 real 1.98 user 0.10 sys 2.19 real 1.98 user 0.10 sys v150-nommap: 2.63 real 1.99 user 0.50 sys 2.67 real 1.98 user 0.51 sys 2.63 real 1.99 user 0.51 sys v1444: 2.15 real 1.94 user 0.09 sys 2.19 real 1.95 user 0.10 sys 2.16 real 1.94 user 0.10 sys Again, we aren't too far away from v1.4.4.4, but the NO_MMAP clearly is hurting us, even on Mac OS X. -- Shawn.