Our latest benchmarks at Phoronix of the Linux 3.9 kernel are looking at the performance of the Intel DRM driver when handling an Intel Core i7 "Ivy Bridge" processor with HD 4000 graphics. The Intel OpenGL Linux graphics performance with this forthcoming kernel was compared to the earlier Linux 3.8, 3.7, 3.6, and 3.5 kernel releases.
With a CompuLab Intense-PC sporting an Intel Core i7 3517UE "Ivy Bridge" processor with Intel HD 4000 graphics and running Ubuntu 13.04 x86_64, the Linux 3.5, 3.6, 3.7, 3.8, and 3.9 Git mainline kernels were compared for a variety of Linux-native OpenGL workloads. This was while the rest of the Ubuntu 13.04 installation was using its stock settings and packages.
Like the other recent quick one-page benchmarking articles, the results in full for this Linux 3.9 Intel coverage can be found on OpenBenchmarking.org in 1304113-UT-INTELIVYB98.
For some Linux games, the open-source Intel Linux graphics driver is slower on the to-be-released Linux 3.9 kernel.
For other games, it's about recovering from performance regressions introduced on earlier kernel releases.
Other games are dead-flat with their performance when upgrading the Linux kernel.