------- Original message -------
From: Branko Čibej
But the original code is already wrong in assuming that res->hash_func and overlay->hash_func are the same, so in fact you're silently fixing a bug with the current change. :)
Surprisingly enough, I actually thought about this bit. Surely two hashes tables with different hash functions would have different hash values. But, we can still use your optimisation with reverse xor (which I did not think of at all). We can check whether both input hashes have the same hash function pointer and use your optimisation in that case. Once again, thanks for your input! -- Bojan
