Mesa 9.2 X.Org/Mir Ubuntu 13.10 Performance Benchmarks
The Warsow performance improved by about 12% on Mesa 9.2 for both the original X.Org Server and when Mir was involved in the rendering pipeline.
The Intel Haswell graphics performance for low quality image settings at 1920 x 1080 is up by 13% for the Xonotic open-source game.
Running Xonotic on the HD Graphics 4600 / Core i7 4900MQ within the System76 Gazelle Pro led to about a 15% frame-rate improvement on Mesa 9.2.0 for high quality Xonotic graphics.
Xonotic with ultra quality settings led to only a very small performance improvement in moving from Mesa 9.1.6 to Mesa 9.2.0.