An Updated Performance Comparison of Virtual Machines and Linux Containers [pdf]
The first graph is already misleading, it's the graph about linpack. It shows that linpack is halved in performance in KVM, the explanation:
".. unless the system topology
is faithfully carried forth into the virtualized environment.
CPU-bound programs that don’t attempt such tuning will
likely have equal but equally poor performance across na-
tive, Docker, and KVM"Seriously? I am the only one who adds a simple parameter when launching KVM. In more production/deployment environments higher level libraries like Libvirt are hopefully used and handle CPU settings automagically.Then we have the MySQL tests. Comparing qcow (KVM) filesystems against native and AUFS.. Really, at least make it a fair fight and include a test which passthroughs the KVM IO to something remotely bare metalish, like a LVM volume.