<p>I am using VMware Server 1.0.7 on Windows XP SP3 at the moment to test software in virtual machines.</p>

<p>I have also tried Microsoft Virtual PC (do not remeber the version, could be 2004 or 2007) and VMware was way faster at the time.</p>

<p>I have heard of Parallels and VirtualBox but I did not have the time to try them out. Anybody has some benchmarks how fast is each of them (or some other)?</p>

<p>I searched for benchmarks on the web, but found nothing useful.</p>

<p>I am looking primarily for free software, but if it is really better than free ones I would pay for it.</p>

<p>Also, if you are using (or know of) a good virtualization software but have no benchmarks for it, please let me know.</p>

The
```
/dev/random
```
device is intended to be a source of cryptographically secure bits.