Vectorization, dependencies and outer loop vectorization: if you can’t beat them, join them

Vectorization, dependencies and outer loop vectorization: if you can’t beat them, join them

As I already mentioned in earlier posts, vectorization is the holy grail of software optimizations: if your hot loop is efficiently vectorized, it is pretty much running at fastest possible speed. So, it is definitely a goal worth pursuing, under two assumptions: (1) that your code has a hardware-friendly memory access pattern and (2) that…