Intel Iris Pro 6200 Graphics On Linux 4.5 + Mesa 11.3-devel
With the very basic OpenArena game, the biggest performance boost for these Iris Pro 6200 tests occurred when switching to DRI3 rendering by default. Fedora 23 updates are among the few Linux distributions now shipping with DRI3 enabled by default but it's sad the upstream xf86-video-intel DDX driver (and its never-ending 3.0 release cycle) has yet to enable DRI3 by default.
The performance with the Tesseract and Unigine Valley OpenGL tests were flat.
Enabling DRI3 rendering yielded a small performance boost for Xonotic with low image quality settings.