Thanks! Yes, basically log_64(n) vs. log_32(n) and it would also require to switch to a 64 bit hash function and adjust hash exhaustion and bit fiddling arithmetic accordingly.
Re the impact of the recursion, that's actually zero for the search code since clang does a tail call optimization; it's a fair point for the removal code.
Re the impact of the recursion, that's actually zero for the search code since clang does a tail call optimization; it's a fair point for the removal code.