@NotNull
  public RegionEntry getOrCreateRegionEntry(@NotNull Object key) {
    return computeIfAbsent(map, key,
        (k) -> regionEntryFactory.createEntry(null, k, Token.REMOVED_PHASE1));
  }
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