It doesn't perform poorly in fact. It can be tuned at 90% of non-nested virtualization, and for workloads where it doesn't, that's more than anything else a tes

It doesn't perform poorly in fact. It can be tuned at 90% of non-nested virtualization, and for workloads where it doesn't, that's more than anything else a testimony to how close virtualized performance is to bare-metal. That said, it does add a lot of complexity.