title: hash functions for int => int mapping
body: <p>I'm writing a hash table implementation for myself in C. I will either be using perfect hashing or Cuckoo hashing, I haven't decided yet. </p>
  
  <p>However, I'm no expert in hash functions / families. As I'll be mapping unsigned 32 bit integers to unsigned 32 bit integers, can anyone recommend to me which functions might serve me best and where to find C implementations of them?</p>
  
  <p>I'm optimizing on performance. </p>
  
  <p>Thanks!</p>