[benwills]

I think they may be asking about the CPU cache.

[Dylan16807]

You have to go out of your way to make a hash that doesn't fit into L1, so again they're all basically the same.

You'll probably end up fitting entirely inside the reorder buffer plus a sequential stream from memory, with the actual caches almost irrelevant.

[benwills]

Sure. Any worthwhile hash function will fit in the instruction cache. But there are ways to make more or less efficient use of the data cache.