public void endDeltaPrepared(long start) {
    stats.incLong(deltasPreparedId, 1);
    if (clock.isEnabled()) {
      stats.incLong(deltasPreparedTimeId, getTime() - start);
    }
  }
@param start the timestamp taken when the operation started
@param isUpdate true if the put was an update (origin remote)
geode-core/src/main/java/org/apache/geode/internal/cache/CachePerfStats.java