void updateValueSize(final Result[] rs, final long latency) throws IOException {
      if (rs == null || (latency == 0)) return;
      for (Result r : rs)
        updateValueSize(r, latency);
    }
Note that all subclasses of this class must provide a public constructor that has the exact
same list of arguments.
hbase-diagnostics/src/main/java/org/apache/hadoop/hbase/PerformanceEvaluation.java