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From: Christer Solskogen <christer.solskogen@gmail.com>
Subject: Re: Slowness with Virtualbox
Date: Mon, 2 Nov 2015 19:45:14 +0100
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On 02.11.2015 18.29, Richard Kuhns wrote:
> How many cores on your physical box?
>
> I have a 6 core Dell precision 7810. If hyperthreading is enabled (so
> FreeBSD apparently thinks I have 12 cores), and VMs running under
> VirtualBox are so slow as to be totally unusable. If I disable
> hyperthreading, VMs are still extremely slow but usable in case of
> emergency.
>

Yes, HT is enabled. I have six cores as well. Pretty sure we're facing 
the same issue. I've never tried with HT disabled, however.

-- 
chs