assertHash(expected, murmur3_32().newHasher().putString(string, charset).hash());
    assertHash(expected, murmur3_32_fixed().newHasher().putString(string, charset).hash());
    assertHash(expected, murmur3_32().hashBytes(string.getBytes(charset)));
    assertHash(expected, murmur3_32_fixed().hashBytes(string.getBytes(charset)));
    assertHash(expected, murmur3_32().newHasher().putBytes(string.getBytes(charset)).hash());

    int res = 0;
    for (int i = 0; i < reps; i++) {
      res +=
          System.identityHashCode(
              hashFunctionEnum
                  .getHashFunction()
                  .newHasher()
                  .putString(strings[i & SAMPLE_MASK], UTF_8)
                  .hash());
    }
    return res;
  }

  @Benchmark
  int hashUtf8GetBytes(int reps) {
    int res = 0;

    int res = 0;
    for (int i = 0; i < reps; i++) {
      res +=
          System.identityHashCode(
              hashFunctionEnum
                  .getHashFunction()
                  .newHasher()
                  .putString(strings[i & SAMPLE_MASK], UTF_8)
                  .hash());
    }
    return res;
  }

  @Benchmark
  int hashUtf8GetBytes(int reps) {
    int res = 0;

   * and checks that their results are identical, no matter which newHasher version we used.
   */
  public void testExhaustive() {
    List<Hasher> hashers =
        ImmutableList.of(
            new StreamingVersion().newHasher(),
            new StreamingVersion().newHasher(52),
            new NonStreamingVersion().newHasher(),
            new NonStreamingVersion().newHasher(123));
    Random random = new Random(0);

    hasher = HASH_FN.newHasher();
    hasher
        .putChar((char) 0x0101)
        .putChar((char) 0x0100)
        .putChar((char) 0x0000)
        .putChar((char) 0x0000);
    assertEquals(hashCode, hasher.hash().asLong());

    hasher = HASH_FN.newHasher();
    hasher.putBytes(new byte[] {0x01, 0x01, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00});
    assertEquals(hashCode, hasher.hash().asLong());

    hasher = HASH_FN.newHasher();
    hasher
        .putChar((char) 0x0101)
        .putChar((char) 0x0100)
        .putChar((char) 0x0000)
        .putChar((char) 0x0000);
    assertEquals(hashCode, hasher.hash().asLong());

    hasher = HASH_FN.newHasher();
    hasher.putBytes(new byte[] {0x01, 0x01, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00});
    assertEquals(hashCode, hasher.hash().asLong());

   *
   * <pre>{@code
   * HashFunction hf = Hashing.md5();
   * HashCode hc = hf.newHasher()
   *     .putLong(id)
   *     .putBoolean(isActive)
   *     .hash();
   * }</pre>
   */
  Hasher newHasher();

  /**
   * Begins a new hash code computation as {@link #newHasher()}, but provides a hint of the expected

   *
   * <pre>{@code
   * HashFunction hf = Hashing.md5();
   * HashCode hc = hf.newHasher()
   *     .putLong(id)
   *     .putBoolean(isActive)
   *     .hash();
   * }</pre>
   */
  Hasher newHasher();

  /**
   * Begins a new hash code computation as {@link #newHasher()}, but provides a hint of the expected

    hasher = HASH_FN.newHasher();
    hasher
        .putChar((char) 0x0101)
        .putChar((char) 0x0100)
        .putChar((char) 0x0000)
        .putChar((char) 0x0000);
    assertEquals(hashCode, hasher.hash().asLong());

    hasher = HASH_FN.newHasher();
    hasher.putBytes(new byte[] {0x01, 0x01, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00});
    assertEquals(hashCode, hasher.hash().asLong());

    assertEquals(expected, SIP_WITH_KEY.hashString(input, UTF_8).asLong());
    assertEquals(expected, SIP_WITH_KEY.newHasher().putString(input, UTF_8).hash().asLong());
    assertEquals(expected, SIP_WITHOUT_KEY.hashString(input, UTF_8).asLong());
    assertEquals(expected, SIP_WITHOUT_KEY.newHasher().putString(input, UTF_8).hash().asLong());
  }

  private static void assertSip(byte[] input, long expected) {