The Linux Evolution For Intel Haswell's Performance
For the computational benchmarks, upgrading from Linux 3.8 to Linux 3.10 yields less of an impact. This is expected unless there's any change in the CPUfreq/scaling driver or power management improvements. GCC 4.8 over GCC 4.7 yielded little change in performance even with the "-march=native" CFLAGS/CXXFLAGS.