*
 * @author Nicholaus Shupe
 */
@NullUnmarked
class CollectionBenchmarkSampleData {
  private final boolean 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);
  }

 *
 * @author Nicholaus Shupe
 */
@NullUnmarked
class CollectionBenchmarkSampleData {
  private final boolean 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);
  }

  private SetImpl impl;

  // the following must be set during setUp
  private Element[] queries;
  private Set<Element> setToTest;

  @BeforeExperiment
  void setUp() {
    CollectionBenchmarkSampleData sampleData =
        new CollectionBenchmarkSampleData(isUserTypeFast, random, hitRate, size);

    this.setToTest = (Set<Element>) impl.create(sampleData.getValuesInSet());
    this.queries = sampleData.getQueries();
  }

  @Benchmark

  Map<Element, Element> map;

  CollectionBenchmarkSampleData elems;

  @Param({"0", "1", "100", "10000"})
  int elements;

  @BeforeExperiment
  public void prepareContents() throws Exception {
    mapsImpl = mapEnums.get(implName);
    elems = new CollectionBenchmarkSampleData(elements);
    contents = new HashMap<>();
    for (Element key : elems.getValuesInSet()) {

  @Param({"ImmutableSetImpl", "HashSetImpl"})
  private SetImpl impl;

  // the following must be set during setUp
  private CollectionBenchmarkSampleData sampleData;

  @BeforeExperiment
  void setUp() {
    sampleData = new CollectionBenchmarkSampleData(true, random, 0.8, size);
  }

  @Benchmark
  int creation(int reps) {
    int x = 0;
    for (int i = 0; i < reps; i++) {

  private Element[] queries;
  private Map<Element, Element> mapToTest;

  private Collection<Element> values;

  @BeforeExperiment
  void setUp() {
    CollectionBenchmarkSampleData sampleData =
        new CollectionBenchmarkSampleData(isUserTypeFast, random, hitRate, size);

    if (sortedData) {
      List<Element> valueList = new ArrayList<>(sampleData.getValuesInSet());
      sort(valueList);