code: public String formatThroughput(int theNumOperations, TimeUnit theUnit) {
  		double throughput = getThroughput(theNumOperations, theUnit);
  		return new DecimalFormat("0.0").format(throughput);
  	}
docs: Determine the current throughput per unit of time (specified in theUnit)
  assuming that theNumOperations operations have happened.
  <p>
  For example, if this stopwatch has 2 seconds elapsed, and this method is
  called for theNumOperations=30 and TimeUnit=SECONDS,
  this method will return 15
  </p>
  
  @see #getThroughput(int, TimeUnit)