public static BitSet build(long[] data) {
      assert data.length > 0 : "data length is zero!";
      return new BitSet(data);
    }
Bare metal bit set implementation. For performance reasons, this implementation does not check
for index bounds nor expand the bit set size if the specified index is greater than the size.
storage-api/src/java/org/apache/hive/common/util/BloomFilter.java