Why do you say that? I would say SIMD is pretty well figured out in well-written code, e.g. small, tight loops over vectors. Unrolling and vectorizing a loop i

Why do you say that? I would say SIMD is pretty well figured out in well-written code, e.g. small, tight loops over vectors. Unrolling and vectorizing a loop is not that hard and happens constantly on all our phones for signal processing, for example.