class CachePerfStats {

  void endDeltaUpdate(long start) {
    stats.incInt(deltaUpdatesId, 1);
    if (clock.isEnabled()) {
      stats.incLong(deltaUpdatesTimeId, getTime() - start);
    }
  }

  public  CachePerfStats(StatisticsFactory factory, StatisticsClock clock);
  public  CachePerfStats(StatisticsFactory factory, String textId, StatisticsClock clock);

}