private int size;

  @Param HashFunctionEnum hashFunctionEnum;

  private byte[] testBytes;

  @BeforeExperiment
  void setUp() {
    testBytes = new byte[size];
    random.nextBytes(testBytes);
  }

  @Benchmark
  int hasher(int reps) {
    HashFunction hashFunction = hashFunctionEnum.getHashFunction();
    int result = 37;
    for (int i = 0; i < reps; i++) {

  private static final int RANDOM_SEED = new Random().nextInt();

  private byte[] testBytes;

  @BeforeExperiment
  void setUp() {
    testBytes = new byte[size];
    new Random(RANDOM_SEED).nextBytes(testBytes);
  }

  @Benchmark
  byte hashing(int reps) {
    byte result = 0x01;
    HashMethod hashMethod = this.hashMethod;
    Algorithm algorithm = this.algorithm;
    for (int i = 0; i < reps; i++) {

    abstract boolean doEquals(byte[] a, byte[] b);
  }

  private byte[] testBytesA;
  private byte[] testBytesB;

  @BeforeExperiment
  void setUp() {
    testBytesA = new byte[size];
    random.nextBytes(testBytesA);
    testBytesB = Arrays.copyOf(testBytesA, size);
    int indexToDifferAt = -1;
    switch (whereToDiffer) {
      case ONE_PERCENT_IN:
        indexToDifferAt = (int) (size * 0.01);
        break;

    abstract boolean doEquals(byte[] a, byte[] b);
  }

  private byte[] testBytesA;
  private byte[] testBytesB;

  @BeforeExperiment
  void setUp() {
    testBytesA = new byte[size];
    random.nextBytes(testBytesA);
    testBytesB = Arrays.copyOf(testBytesA, size);
    int indexToDifferAt = -1;
    switch (whereToDiffer) {
      case ONE_PERCENT_IN:
        indexToDifferAt = (int) (size * 0.01);
        break;

    hasher.assertBytes(new byte[] {1, 2});
  }

  public void testString() {
    Random random = new Random();
    for (int i = 0; i < 100; i++) {
      byte[] bytes = new byte[64];
      random.nextBytes(bytes);
      String s = new String(bytes, UTF_16LE); // so all random strings are valid
      assertEquals(
          new TestHasher().putUnencodedChars(s).hash(),

  }

  public void testAgainstSimplerImplementation() {
    Random r = new Random(1234567);
    for (int length = 0; length < 1000; length++) {
      byte[] bytes = new byte[length];
      r.nextBytes(bytes);
      assertCrc(referenceCrc(bytes), bytes);
    }
  }

  private static int referenceCrc(byte[] bytes) {
    int crc = ~0;
    for (byte b : bytes) {

  @BeforeExperiment
  public void setUp() {
    Random rng = new Random();
    for (int i = 0; i < encodingInputs.length; i++) {
      encodingInputs[i] = new byte[n];
      rng.nextBytes(encodingInputs[i]);
      decodingInputs[i] = encoding.encoding.encode(encodingInputs[i]);
    }
  }

  @Benchmark
  public int encode(int reps) {
    int tmp = 0;
    for (int i = 0; i < reps; i++) {

    hasher.assertBytes(new byte[] {1, 2});
  }

  public void testString() {
    Random random = new Random();
    for (int i = 0; i < 100; i++) {
      byte[] bytes = new byte[64];
      random.nextBytes(bytes);
      String s = new String(bytes, UTF_16LE); // so all random strings are valid
      assertEquals(
          new TestHasher().putUnencodedChars(s).hash(),

  private static final int RANDOM_SEED = new Random().nextInt();

  private byte[] testBytes;

  @BeforeExperiment
  void setUp() {
    testBytes = new byte[size];
    new Random(RANDOM_SEED).nextBytes(testBytes);
  }

  @Benchmark
  byte hashing(int reps) {
    byte result = 0x01;
    HashMethod hashMethod = this.hashMethod;
    Algorithm algorithm = this.algorithm;
    for (int i = 0; i < reps; i++) {

  private int size;

  @Param HashFunctionEnum hashFunctionEnum;

  private byte[] testBytes;

  @BeforeExperiment
  void setUp() {
    testBytes = new byte[size];
    random.nextBytes(testBytes);
  }

  @Benchmark
  int hasher(int reps) {
    HashFunction hashFunction = hashFunctionEnum.getHashFunction();
    int result = 37;
    for (int i = 0; i < reps; i++) {