Phoronix benchmarked Ubuntu 13.04 against OS X 10.8.3
In the road to the release of Ubuntu 13.04 "Raring Ringtail" later this month will be a number of articles benchmarking this major Linux distribution update against its friends and competitors. To complement the Ubuntu 13.04 benchmarks already delivered, including Microsoft Windows 7 and Windows 8 benchmarks, here are tests of Apple's OS X 10.8.3 operating system on a MacBook Pro compared to Ubuntu 12.04.2 LTS, Ubuntu 12.10, and the latest Ubuntu 13.04 (post Beta 2) state. Ubuntu 13.04 is generally competitive with OS X 10.8 and in some new areas is now beating out Apple's operating system on their own hardware.Ubuntu 13.04 Linux Can Outperform Apple OS X 10.8.3
For today's testing, an Apple MacBook Pro with an Intel Core i5 520M CPU, 4GB of system memory, 120GB OCZ Agility 2 SSD, and Intel "Ironlake" IGP graphics were benchmarked under OS X 10.8.3, Ubuntu 12.04.2 LTS + updates, Ubuntu 12.10, and Ubuntu 13.04. The same hardware was used throughout testing and all operating systems were tested in their stock configuration/settings from the same Apple MacBook Pro. While there's also NVIDIA graphics onboard this MacBook Pro, due to the rather non-pleasant state of switchable graphics on Linux, all OSes were limited to using the Intel integrated graphics.