I was referring to https://github.com/HazyResearch/blocking-tutorial/blob/master/compare_blas.cpp https://github.com/HazyResearch/blocking-tutorial/blob/maste..

I was referring to https://github.com/HazyResearch/blocking-tutorial/blob/master/compare_blas.cpp https://github.com/HazyResearch/blocking-tutorial/blob/maste... which upon closer inspection uses intrinsics in the inner loop, but to a much lesser degree and arguably specifying -mavx2 -mfma compiler options would yield comparable results...