From owner-freebsd-hackers Wed Jun 3 23:05:03 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id XAA05857 for freebsd-hackers-outgoing; Wed, 3 Jun 1998 23:05:03 -0700 (PDT) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from frmug.org (frmug-gw.frmug.org [193.56.58.252]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id XAA05833 for ; Wed, 3 Jun 1998 23:04:50 -0700 (PDT) (envelope-from roberto@keltia.freenix.fr) Received: (from uucp@localhost) by frmug.org (8.9.0/frmug-2.3/nospam) with UUCP id IAA04155 for hackers@FreeBSD.ORG; Thu, 4 Jun 1998 08:04:47 +0200 (CEST) (envelope-from roberto@keltia.freenix.fr) Received: (from roberto@localhost) by keltia.freenix.fr (8.9.0.Beta4/keltia-2.14/nospam) id IAA04380 for hackers@FreeBSD.ORG; Thu, 4 Jun 1998 08:01:40 +0200 (CEST) (envelope-from roberto) Message-ID: <19980604080140.A4348@keltia.freenix.fr> Date: Thu, 4 Jun 1998 08:01:40 +0200 From: Ollivier Robert To: hackers@FreeBSD.ORG Subject: Re: Recompiling sources with "-O2 -m486 -pipe" Mail-Followup-To: hackers@FreeBSD.ORG References: <199806032301.QAA01867@dingo.cdrom.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.92.3i In-Reply-To: <199806032301.QAA01867@dingo.cdrom.com>; from Mike Smith on Wed, Jun 03, 1998 at 04:01:10PM -0700 X-Operating-System: FreeBSD 3.0-CURRENT ctm#4311 AMD-K6 MMX @ 225 MHz Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG According to Donn Miller: > > About the -m486 option -- I use -m486 -O3 -pipe all the time; does it slow > > down the execution somewhat? I noticed the Mozilla sources defined -m486 is likely to slow down the execution because -m486 alignments are not really suitable to pentium and later processors. -m486 doesn't generate any special instruction (the code will run on a 386). If you want to see any difference in speed, switch to egcs/pgcc which has a pentium mode (and a Cyrix/K5/K6 mode for pgcc). -- Ollivier ROBERT -=- FreeBSD: The Power to Serve! -=- roberto@keltia.freenix.fr FreeBSD keltia.freenix.fr 3.0-CURRENT #60: Fri May 15 21:04:22 CEST 1998 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message