@Override
    public boolean equals(Object o) {
      if (this == o) {
        return true;
      }
      if (o == null || getClass() != o.getClass()) {
        return false;
      }

      Item item = (Item) o;

      return value == item.value;
    }
Performance tests for {@link LongMinHeap} implementations.

Times how long it takes to merge N sorted lists of random elements.
planetiler-benchmarks/src/main/java/com/onthegomap/planetiler/collection/BenchmarkKWayMerge.java