Intel Ivy Bridge Linux Virtualization Performance
KVM is also open-source and very easy to use when paired with virt-manager or the new GNOME Boxes utility.
While both KVM and VirtualBox had access to all eight logical cores (four physical plus Hyper Threading), VirtualBox often fell far behind in the CPU intensive tasks.
KVM was also doing better than VirtualBox with the disk-focused workloads.
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