Preview: OS X 10.10 Yosemite vs. Ubuntu Linux GPU Performance
With Nexuiz the Intel OpenGL performance on OS X Yosemite was unchanged compared to OS X 10.9.4 and for this game the performance on OS X matched that of Ubuntu with the very latest development drivers.
For the basic Urban Terror open-source game, the performance on Ubuntu Linux was much greater with the Yosemite results being unchanged compared to OS X 10.9.4.