Prior to joining Valve to work on the Linux graphics stack where one of his first objectives was working on the Gallium3D/RadeonSI shader cache, Timothy Arceri had been working for Collabora where he was tidying up the Mesa on-disk shader cache with a focus on the Intel i965 OpenGL driver. That has yet to be merged with Intel support but now there are developers back to working on this support…

Source: Phoronix – Intel Gets Back To Working On Their OpenGL Shader Cache