Dunno, just about every compiler on the planet has different settings for different CPUs and often let you hard code what you prefer. I can see MKL not automat

Dunno, just about every compiler on the planet has different settings for different CPUs and often let you hard code what you prefer. I can see MKL not automatically picking the fastest path, but they should allow you to manually pick. In fact they do, this flag lets you pick the AVX2 libs and speed increases up to 6.6x in my tests with matlab. export MKL_DEBUG_CPU_TYPE=5