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Date: Wed, 13 Aug 1997 21:20:53 -0700
From: Julian Elischer <julian@whistle.com>
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To: "Jay D. Nelson" <jdn@qiv.com>
CC: Shawn Ramsey <shawn@luke.cpl.net>, Paul Dekkers <psd@worldaccess.nl>,
        freebsd-questions@FreeBSD.ORG
Subject: Re: FreeBSD is slower than Linux !?
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Jay D. Nelson wrote:
> 
> My point was simply that when you put both under a real life multiuser
> load, the differences are fairly obvious. And frankly, I wouldn't use
> async mounts for anything other than news.
> 
> -- Jay

I use them for /usr/obj or /usr/src for that matter 
(I can always get it back from the cvs tree.)
makes compiles al ot faster..
I also switch to async mode whenever I have a massive rm -rf to do

or for restores or unpacking packages and tar files etc..