public static Hash getInstance() {
    return _instance;
  }
This is a very fast, non-cryptographic hash suitable for general hash-based lookup. See
http://murmurhash.googlepages.com/ for more details.
<p>
The C version of MurmurHash 2.0 found at that site was ported to Java by Andrzej Bialecki (ab at
getopt org).
</p>
hbase-common/src/main/java/org/apache/hadoop/hbase/util/MurmurHash.java