@Benchmark
  public RegionEntry workload(Blackhole blackhole) throws RegionClearedException {
    final Object key = getKey();
    final RegionEntry entry = map.get(key);
    blackhole.consume(entry);
    consumeCPU(10);
    return put(key);
  }
Artificial work load of fetching a value from the cache, doing some work and replacing the
entry.
geode-core/src/jmh/java/org/apache/geode/internal/util/concurrent/ConcurrentHashMapObjectBenchmark.java