From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nicolas Pitre Subject: Re: [PATCH] delta micro optimization Date: Fri, 10 Feb 2006 15:38:57 -0500 (EST) Message-ID: References: <7vhd77vv9o.fsf@assigned-by-dhcp.cox.net> Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Content-Transfer-Encoding: 7BIT Cc: git@vger.kernel.org X-From: git-owner@vger.kernel.org Fri Feb 10 21:39:02 2006 Return-path: Received: from vger.kernel.org ([209.132.176.167]) by deer.gmane.org with esmtp (Exim 3.35 #1 (Debian)) id 1F7f2k-00007N-00 for ; Fri, 10 Feb 2006 21:39:02 +0100 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932178AbWBJUi7 (ORCPT ); Fri, 10 Feb 2006 15:38:59 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932184AbWBJUi7 (ORCPT ); Fri, 10 Feb 2006 15:38:59 -0500 Received: from relais.videotron.ca ([24.201.245.36]:8272 "EHLO relais.videotron.ca") by vger.kernel.org with ESMTP id S932178AbWBJUi6 (ORCPT ); Fri, 10 Feb 2006 15:38:58 -0500 Received: from xanadu.home ([24.202.136.67]) by VL-MO-MR002.ip.videotron.ca (Sun Java System Messaging Server 6.2-2.05 (built Apr 28 2005)) with ESMTP id <0IUH00CEYO0XKG30@VL-MO-MR002.ip.videotron.ca> for git@vger.kernel.org; Fri, 10 Feb 2006 15:38:57 -0500 (EST) In-reply-to: <7vhd77vv9o.fsf@assigned-by-dhcp.cox.net> X-X-Sender: nico@localhost.localdomain To: Junio C Hamano Sender: git-owner@vger.kernel.org Precedence: bulk X-Mailing-List: git@vger.kernel.org Archived-At: On Fri, 10 Feb 2006, Junio C Hamano wrote: > That looks obviously correct but it really is micro. Have you > benched it? On which architectures? Does it help everywhere or > register starved ones benefit more than others? I doubt the performance difference would be measurable on i386 although the code is a bit smaller. On ARM it causes a code reduction of 12.5% in count-delta.o. Nicolas