The AVX-512 constants aren't embedded in the instructions, but the address to load being static means the CPU can start to cache them when the decoder gets to t

The AVX-512 constants aren't embedded in the instructions, but the address to load being static means the CPU can start to cache them when the decoder gets to them, possibly even before it knows that the input to the function is. In contrast, for the scalar code, the CPU must complete the divisions (which'll become multiplications, but even those still have relatively high latency) before it can even begin to look for what to cache.