From owner-freebsd-hackers@FreeBSD.ORG  Tue Jan  9 14:08:50 2007
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Date: Tue, 9 Jan 2007 08:42:06 -0500 (EST)
From: "Mike Jakubik" <mikej@rogers.com>
To: "Steven Hartland" <killing@multiplay.co.uk>
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Cc: freebsd-hackers@freebsd.org, freebsd-net@freebsd.org
Subject: Re: Slow FreeBSD -> Windows performance with inflight enabled
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On Mon, January 8, 2007 2:58 pm, Steven Hartland wrote:
> I've just been looking at an issue reported by some
> of our users that downloads from our one of our sites
> run on FreeBSD 6.1 and Apache 1.3 where strangely
> slow.
>
> After doing some digging around I found that two remote
> machines on the same network had wildly different results.
> The difference being one was Windows (slow) and one was
> FreeBSD 6.1 (fast).
>
> The results where 380Kb/s download speeds on Windows vs
> 500Kb/s on FreeBSD. I played around and Googled to find
> that this appears to caused by inflight. Disabling it
> and restarting apache cures the problem.

AFAIK there was some work done on this to make it more adaptive for LAN
networks, but im not sure which version got this.