for(int run=0; run<100; run++) {
final HLL hll = new HLL(log2m, regwidth, 128/*explicitThreshold, arbitrary, unused*/, sparseThreshold, HLLType.SPARSE);
final Int2ByteOpenHashMap map = new Int2ByteOpenHashMap();
map.defaultReturnValue((byte)0);
for(int i=0; i<sparseThreshold; i++) {
final long rawValue = random.nextLong();
final short registerIndex = ProbabilisticTestUtil.getRegisterIndex(rawValue, log2m);