GCC Core-AVX2 "Haswell" CPU Optimization Tests
Phoronix: GCC Core-AVX2 "Haswell" CPU Optimization Tests
Our latest tests from an Intel Core i7 4900MQ "Haswell" laptop are looking at the impact of applying CPU compiler optimizations for this high-end "core-avx2" processor when using a recent GCC 4.9 development snapshot...
Btw, Graysky's patches make those additional CPU options accessible in the kernel configuration: https://github.com/graysky2/kernel_gcc_patch
He also has some benchmarks available on that page.