From mboxrd@z Thu Jan 1 00:00:00 1970 From: Linus Torvalds Subject: Re: [PATCH] write-tree performance problems Date: Wed, 20 Apr 2005 09:41:16 -0700 (PDT) Message-ID: References: <200504191250.10286.mason@suse.com> <200504192049.21947.mason@suse.com> <200504201122.35448.mason@suse.com> Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Cc: git@vger.kernel.org X-From: git-owner@vger.kernel.org Wed Apr 20 18:36:31 2005 Return-path: Received: from vger.kernel.org ([12.107.209.244]) by ciao.gmane.org with esmtp (Exim 4.43) id 1DOIAf-0004uG-Rz for gcvg-git@gmane.org; Wed, 20 Apr 2005 18:35:26 +0200 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261729AbVDTQjj (ORCPT ); Wed, 20 Apr 2005 12:39:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261722AbVDTQj0 (ORCPT ); Wed, 20 Apr 2005 12:39:26 -0400 Received: from fire.osdl.org ([65.172.181.4]:35506 "EHLO smtp.osdl.org") by vger.kernel.org with ESMTP id S261721AbVDTQjX (ORCPT ); Wed, 20 Apr 2005 12:39:23 -0400 Received: from shell0.pdx.osdl.net (fw.osdl.org [65.172.181.6]) by smtp.osdl.org (8.12.8/8.12.8) with ESMTP id j3KGdJs4009929 (version=TLSv1/SSLv3 cipher=EDH-RSA-DES-CBC3-SHA bits=168 verify=NO); Wed, 20 Apr 2005 09:39:19 -0700 Received: from localhost (shell0.pdx.osdl.net [10.9.0.31]) by shell0.pdx.osdl.net (8.13.1/8.11.6) with ESMTP id j3KGdHB6012967; Wed, 20 Apr 2005 09:39:18 -0700 To: Chris Mason In-Reply-To: X-Spam-Status: No, hits=0 required=5 tests= X-Spam-Checker-Version: SpamAssassin 2.63-osdl_revision__1.35__ X-MIMEDefang-Filter: osdl$Revision: 1.109 $ X-Scanned-By: MIMEDefang 2.36 Sender: git-owner@vger.kernel.org Precedence: bulk X-Mailing-List: git@vger.kernel.org On Wed, 20 Apr 2005, Linus Torvalds wrote: > > NO! Don't see if this works. For the "sha1 file already exists" file, it > forgot to return the SHA1 value in "returnsha1", and would thus corrupt > the trees it wrote. Proper version with fixes checked in. For me, it brings down the time to write a kernel tree from 0.34s to 0.24s, so a third of the time was just compressing objects that we ended up already having. Two thirds to go ;) Linus