From owner-freebsd-current Tue Oct 29 23:26:29 2002 Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 8AAE737B401 for ; Tue, 29 Oct 2002 23:26:28 -0800 (PST) Received: from axl.seasidesoftware.co.za (axl.seasidesoftware.co.za [196.31.7.201]) by mx1.FreeBSD.org (Postfix) with ESMTP id 580AB43E4A for ; Tue, 29 Oct 2002 23:26:27 -0800 (PST) (envelope-from sheldonh@starjuice.net) Received: from sheldonh by axl.seasidesoftware.co.za with local (Exim 4.10) id 186nEv-0009T1-00; Wed, 30 Oct 2002 09:26:09 +0200 Date: Wed, 30 Oct 2002 09:26:09 +0200 From: Sheldon Hearn To: Matthew Dillon Cc: Terry Lambert , Raymond Kohler , current@FreeBSD.ORG Subject: Re: questions about the state of current Message-ID: <20021030072609.GO36040@starjuice.net> Mail-Followup-To: Matthew Dillon , Terry Lambert , Raymond Kohler , current@FreeBSD.ORG References: <2570443.1035916854787.JavaMail.wshttp@emss03g01.ems.lmco.com> <3DBEF55E.A0F9ED1B@mindspring.com> <200210292106.g9TL6aoc010659@apollo.backplane.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200210292106.g9TL6aoc010659@apollo.backplane.com> User-Agent: Mutt/1.5.1i X-Scanner: exiscan for exim4 (http://duncanthrax.net/exiscan/) *186nEv-0009T1-00*c.iglXEcL96* Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On (2002/10/29 13:06), Matthew Dillon wrote: > :Most of the speed difference is WITNESS, INVARIANTS, and other > :debugging code that's turned on by default in the config files > :for -current. You can turn most of it off. That said, -current > :is slower than -stable in a number of places, so expect some > :slowdown, if you are running non-concurrent code. > > I would concur with this diagnosis. With witness turned off > -current is around 15% slower then -stable for general purpose > computing, like a 'make buildworld -j 20', and I expect that > -stable will beat out -current on single-cpu boxes for a long > time to come. I hate to "me too", but I have a different flavour to offer prospective early adopters. I tried out -CURRENT on my Compaq Presario 2700 (yuk, spit), which is a 512MB PIII. When I downgraded to -STABLE, the performance with simple command-line stuff was noticible. Not huge, but "tangible to a human being". So the answer to "will I notice a performance degredation" is "yes for typical end-users, but not huge". Ciao, Sheldon. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message