JPerf is a perfect hash function generator for
Java. The principle of perfect hashing is to
reduce the average constant overhead of a hash
table by precomputing a hash function which is
optimal for the key set. Other advantages include
a reduction in memory usage. Finding such a hash
function is hard, especially in the general case.
These run-time savings come at a cost of increased
map creation time. JPerf can create a perfect hash
function for a given set of keys and values.
