title: Fast Hash function in PHP without caring about security
body: <p>I am looking for a fast hash functions that I will use internally in my webapp. It does not need to be secure (e.g. I do not care if a possible attacker could find a message with the same hash).</p>
  
  <p>It just needs to be fast and obviously collision resistant. For now it seems that MD5 would be the best approach (See the stackoverflow Thread <a href="https://stackoverflow.com/questions/2722943/is-calculating-an-md5-hash-less-cpu-intensive-than-sha-1-or-sha-2">Is calculating an MD5 hash less CPU intensive than SHA family functions?</a>).
  Or has anyrone ran into a similiar issue and knows of a better hash algorithm?</p>
  
  <p><strong>Update</strong></p>
  
  <p>Sorry, I guess I should have looked more carefully: <a href="https://stackoverflow.com/questions/2575787/looking-for-a-fast-hash-function">Looking for a fast hash-function</a></p>