Looking At GNU/Linux's Performance Over 2016 With Intel's Clear Linux
While the Haswell Linux graphics support has been rather mature for some time and most Intel OTC developers focusing on Skylake and newer, there were some gains to see in some of these OpenGL tests.
Sadly at the end of 2016, Intel Haswell remains at OpenGL 3.3 as the FP64 patches as the last GL 4.0 blocker haven't yet been merged to mainline Mesa.
Xonotic saw faster performance as a result of the kernel and Mesa advancements in 2016.
GpuTest synthetic OpenGL benchmark results varied from being the same to faster with the newest Clear Linux.