@Benchmark
  @Measurement(time = 5, iterations = 10)
  @Warmup(iterations = 5)
  @BenchmarkMode(Mode.AverageTime)
  @OutputTimeUnit(TimeUnit.MILLISECONDS)
  public int addNewMemberToBalancedRegion() throws UnknownHostException {
    RebalanceModelBuilder modelBuilder = new RebalanceModelBuilder(startingMembers, totalBuckets);
    PartitionedRegionLoadModel model = modelBuilder.withNewMembers(1).createModel();
    return doMoves(new MoveBuckets(), model);
  }
This test simulates an existing partitioned region with evenly distributed numbers of buckets,
all of which are exactly the same size and with no replicate copies. A single new member is added
to the cluster and the region is then rebalanced. This represents a best-case scenario for
rebalancing a cluster after the addition of a member.
geode-core/src/jmh/java/org/apache/geode/cache/partitioned/rebalance/RebalanceOnAddingMemberBenchmark.java