256‑bit tweak? If you’re just piling it on for the sake of “more bits,” that’s like adding a megabyte of RAM to a micro‑controller to play with your coffee. If you actually need that extra entropy, make the tweak a zero‑copy, compile‑time constant and you’ll have a shortcut that even me will nod at. Otherwise, just cut it, keep the core fast, and don’t let your own code become the security bottleneck.