nested100 qemu testing on Ubuntu 17.04 via the Phoronix Test Suite. Common KVM: Processor: 16 x Common KVM @ 2.30GHz (16 Cores), Motherboard: QEMU Standard PC (i440FX + PIIX 1996), Chipset: Intel 440FX- 82441FX PMC, Memory: 16384 MB + 16384 MB + 16384 MB + 2072 MB RAM, Disk: 54GB QEMU HDD, Network: Intel 82540EM Gigabit OS: Ubuntu 17.04, Kernel: 4.10.0-37-generic (x86_64), Compiler: GCC 6.3.0 20170406, File-System: ext4, System Layer: qemu Timed Linux Kernel Compilation 4.9 Time To Compile Seconds < Lower Is Better Common KVM . 106.57 |==========================================================