From owner-freebsd-stable@FreeBSD.ORG  Wed May 25 21:41:23 2005
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From: Bjarne Wichmann Petersen <freebsd.nospam@mekanix.dk>
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Date: Wed, 25 May 2005 23:42:01 +0200
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Cc: Mike Jakubik <mikej@rogers.com>, Matthias Buelow <mkb@incubus.de>,
	Kris Kennaway <kris@obsecurity.org>
Subject: Re: Performance of 4.x vs 5.x (Re: Lifetime of FreeBSD branches)
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On Monday 23 May 2005 23:36, Kris Kennaway wrote:

> Also try defining PREEMPTION in your kernel on 5.x and above (if you
> are running i386 or amd64).  There have been very occasional reports
> of panics with this option enabled (although I use it everywhere and
> have not seen problems on my heavily loaded machines), but interactive
> response should be much better.

I've had PREEMTION enabled in 5-STABLE for at couple of month and had the 
opposite experience. Eg. when clicking on a file in a fileselector (I'm using 
KDE) it would take 2-3 seconds before the file got highlighted. After 
disabling PREEMTION again responsetime seems to have improved.

Bjarne