public static BitSet build(long bits) {
      return build(new long[(int) Math.ceil((double) bits / (double) Long.SIZE)]);
    }
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