12,_) slightly slower.</p>
  
   <p>Any functions that have a jenkins64 prefix use Bob Jenkins' SpookyHash   
(SpookyV2, August 5 2012).  In my testing, the function jenkins64_128 is   
4.5 times slower than crypto:hash(md5,_) which provides the same number   
of bits, because the jenkins64 functions are implemented in Erlang.</p>
  
   All the jenkins prefix functions have been checked with the C++
   implementations to ensure the same hash value is obtained, though
   this implementation forces numbers to