Using AVX intrinsics instead of SSE does not improve speed — why?

Question

I\'ve been using Intel\'s SSE intrinsics for quite some time with good performance gains. Hence, I expected the AVX intrinsics to further speed-up my programs. This, unfortunate

Answer 1

Depending on your processor hardware, the AVX instructions may be emulated in the hardware as SSE instructions. You'd need to look up your processor's part number to get exact specs on it, but this is one of the main differences between low-end and high-end intel processors, the number of specialize execution units vs. hardware emulation.