pbzip2 KVM QEMU 1.0 testing on Fedora 21 via the Phoronix Test Suite. pbzip2: Processor: 4 x QEMU Virtual 1.0 @ 2.20GHz (4 Cores), Motherboard: OpenStack Foundation Nova v2014.2.4, Memory: 1 x 8192 MB RAM, Disk: 79GB OS: Fedora 21, Kernel: 3.17.4-301.fc21.x86_64 (x86_64), Compiler: GCC 4.9.2 20150212, File-System: ext4, Screen Resolution: 1024x768, System Layer: KVM QEMU 1.0 Parallel BZIP2 Compression 1.1.6 256MB File Compression Seconds < Lower Is Better pbzip2 . 37.70 |===============================================================