From owner-freebsd-questions@FreeBSD.ORG Mon Jun 4 18:17:44 2007 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 7878016A46C for ; Mon, 4 Jun 2007 18:17:44 +0000 (UTC) (envelope-from cperciva@freebsd.org) Received: from pd3mo2so.prod.shaw.ca (shawidc-mo1.cg.shawcable.net [24.71.223.10]) by mx1.freebsd.org (Postfix) with ESMTP id 5588713C45A for ; Mon, 4 Jun 2007 18:17:44 +0000 (UTC) (envelope-from cperciva@freebsd.org) Received: from pd3mr1so.prod.shaw.ca (pd3mr1so-qfe3.prod.shaw.ca [10.0.141.177]) by l-daemon (Sun ONE Messaging Server 6.0 HotFix 1.01 (built Mar 15 2004)) with ESMTP id <0JJ4004IBITG8PF0@l-daemon> for freebsd-questions@freebsd.org; Mon, 04 Jun 2007 12:17:40 -0600 (MDT) Received: from pn2ml6so.prod.shaw.ca ([10.0.121.150]) by pd3mr1so.prod.shaw.ca (Sun Java System Messaging Server 6.2-7.05 (built Sep 5 2006)) with ESMTP id <0JJ400C9EITELO11@pd3mr1so.prod.shaw.ca> for freebsd-questions@freebsd.org; Mon, 04 Jun 2007 12:17:40 -0600 (MDT) Received: from hexahedron.daemonology.net ([24.82.18.31]) by l-daemon (Sun ONE Messaging Server 6.0 HotFix 1.01 (built Mar 15 2004)) with SMTP id <0JJ40015AITECQE0@l-daemon> for freebsd-questions@freebsd.org; Mon, 04 Jun 2007 12:17:38 -0600 (MDT) Received: (qmail 55402 invoked from network); Mon, 04 Jun 2007 18:17:15 +0000 Received: from unknown (HELO hexahedron.daemonology.net) (127.0.0.1) by localhost with SMTP; Mon, 04 Jun 2007 18:17:15 +0000 Date: Mon, 04 Jun 2007 11:17:14 -0700 From: Colin Percival In-reply-to: <466451CA.6020108@tundraware.com> To: Tim Daneliuk Message-id: <4664572A.4060003@freebsd.org> MIME-version: 1.0 Content-type: text/plain; charset=ISO-8859-1 Content-transfer-encoding: 7bit X-Enigmail-Version: 0.95.0 References: <466451CA.6020108@tundraware.com> User-Agent: Thunderbird 2.0.0.0 (X11/20070511) Cc: freebsd-questions@freebsd.org Subject: Re: New != Faster X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 04 Jun 2007 18:17:44 -0000 Tim Daneliuk wrote: > Old 2 PIII @600Mhz 768K 26M/sec 4.11-stable/SMP > 50-60 min > New Pent D (2 core)@3.2GHz 2G 50M/sec 6.2-stable/SMP > 40-50 min > Fast 2 Xeon @3GHz 3G 130M/sec 4.11-stable/SMP > 8 min > > Is the difference in speed > attributable to 4.11 being faster than 6.2? Close. The difference in speed is due to the compiler in 4.11 being faster than the compiler in 6.2. FreeBSD uses the gcc compiler, and between FreeBSD 4.11 and FreeBSD 6.2 that has been upgraded from 2.9 to 3.4. The general trend each time gcc is upgraded is that it takes 2x longer to compile code, but produces code which is 5% faster (as a result of "working harder" to find optimizations). FreeBSD 6.2 is faster than FreeBSD 4.11 for almost everything except compiling itself. :-) Colin Percival