Ubuntu 14.10 XMir System Compositor Benchmarks

Moving over to the OpenGL benchmarks, with OpenArena there's a small dip in performance when running with the non-default XMir stack.

The Tesseract performance is down by about 5% with the new graphics stack when running with XMir for non-Mir-compliant games/applications.

When running Xonotic was also indicating around a small but measurable performance penalty in having to go through the XMir stack.

Stay tuned for more Ubuntu 14.10 Linux benchmarks to come in the days ahead on Phoronix. Have any requests? Let us know!