* @since 11.0
 */
@GwtCompatible
public final class AtomicLongMap<K> implements Serializable {
  private final ConcurrentHashMap<K, Long> map;

  private AtomicLongMap(ConcurrentHashMap<K, Long> map) {
    this.map = checkNotNull(map);
  }

  /** Creates an {@code AtomicLongMap}. */
  public static <K> AtomicLongMap<K> create() {
    return new AtomicLongMap<>(new ConcurrentHashMap<>());
  }

  public void testModify_basher() throws Exception {
    int nTasks = 3000;
    int nThreads = 100;
    int getsPerTask = 1000;
    int deltaRange = 10000;
    String key = "key";

    AtomicLongMap<String> map = AtomicLongMap.create();

    ExecutorService threadPool = newFixedThreadPool(nThreads);
    ArrayList<Future<Long>> futures = new ArrayList<>();
    for (int i = 0; i < nTasks; i++) {
      futures.add(

 * </ul>
 *
 * <p>If your values may be zero, negative, or outside the range of an int, you may wish to use
 * {@link com.google.common.util.concurrent.AtomicLongMap} instead. Note, however, that unlike
 * {@code Multiset}, {@code AtomicLongMap} does not automatically remove zeros.
 *
 * <p>See the Guava User Guide article on <a href=

 * </ul>
 *
 * <p>If your values may be zero, negative, or outside the range of an int, you may wish to use
 * {@link com.google.common.util.concurrent.AtomicLongMap} instead. Note, however, that unlike
 * {@code Multiset}, {@code AtomicLongMap} does not automatically remove zeros.
 *
 * <p>See the Guava User Guide article on <a href=