Ubuntu 11.10: Xen vs. KVM vs. VirtualBox
Written by Michael Larabel in Software on 31 October 2011 at 05:00 AM EDT. Page 3 of 7. 27 Comments.
When turning the focus to cryptography from ray-tracing, KVM continued to be the fastest virtualization contender at 97% the raw speed of the system. Closely behind with the DES workload was VirtualBox and the Xen DomU instance was at just 69% the speed of bare metal.
Ditto.
When running the Blowfish test, VirtualBox and KVM were both fast, while the DomU guest continued in its ~30% performance penalty.