private final SpecialRandom random;
  private final double hitRate;
  private final int size;

  private final Set<Element> valuesInSet;
  private final Element[] queries;

  CollectionBenchmarkSampleData(int size) {
    this(true, new SpecialRandom(), 1.0, size);
  }

  CollectionBenchmarkSampleData(
      boolean isUserTypeFast, SpecialRandom random, double hitRate, int size) {
    this.isUserTypeFast = isUserTypeFast;

  private final SpecialRandom random;
  private final double hitRate;
  private final int size;

  private final Set<Element> valuesInSet;
  private final Element[] queries;

  CollectionBenchmarkSampleData(int size) {
    this(true, new SpecialRandom(), 1.0, size);
  }

  CollectionBenchmarkSampleData(
      boolean isUserTypeFast, SpecialRandom random, double hitRate, int size) {
    this.isUserTypeFast = isUserTypeFast;

    Object one = new Object();
    cache.getUnchecked(one);
    CacheStats stats = cache.stats();
    assertEquals(1, stats.requestCount());
    assertEquals(0, stats.hitCount());
    assertThat(stats.hitRate()).isEqualTo(0.0);
    assertEquals(1, stats.missCount());
    assertThat(stats.missRate()).isEqualTo(1.0);
    assertEquals(1, stats.loadCount());
    long totalLoadTime = stats.totalLoadTime();

    StatsCounter counter = new SimpleStatsCounter();
    CacheStats stats = counter.snapshot();
    assertEquals(0, stats.requestCount());
    assertEquals(0, stats.hitCount());
    assertThat(stats.hitRate()).isEqualTo(1.0);
    assertEquals(0, stats.missCount());
    assertThat(stats.missRate()).isEqualTo(0.0);
    assertEquals(0, stats.loadSuccessCount());
    assertEquals(0, stats.loadExceptionCount());

  }

  /**
   * Returns the ratio of cache requests which were hits. This is defined as {@code hitCount /
   * requestCount}, or {@code 1.0} when {@code requestCount == 0}. Note that {@code hitRate +
   * missRate =~ 1.0}.
   */
  public double hitRate() {
    long requestCount = requestCount();
    return (requestCount == 0) ? 1.0 : (double) hitCount / requestCount;
  }

  /**

    Preconditions.checkArgument(hitRate >= 0 && hitRate <= 1, "hitRate must be in the range [0,1]");

    enumType =
        Class.forName(EnumsBenchmark.class.getCanonicalName() + "$" + enumSize + "Enum")
            .asSubclass(Enum.class);

    Enum<?>[] allConstants = enumType.getEnumConstants();
    List<String> hits = new ArrayList<>();
    for (int i = 0; i < hitRate * 256 / 3; ++i) {

        .Builder()
        .status("ICY 200 OK")
        .addHeader("Accept-Ranges: none")
        .addHeader("Content-Type: audio/mpeg")
        .addHeader("icy-br:128")
        .addHeader("ice-audio-info: bitrate=128;samplerate=44100;channels=2")
        .addHeader("icy-br:128")
        .addHeader("icy-description:Rock")
        .addHeader("icy-genre:riders")
        .addHeader("icy-name:A2RRock")

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