docs: function printStats() {
    _.each(statsTracker, function(vals, stat) {
      var numStats = vals.length;
      var total = _.reduce(vals, function(memo, num) {
        return memo + num;
      }, 0);
      var avg = parseFloat(total / numStats).toFixed(4) + 'ms';
      var printableTotal = parseFloat(total).toFixed(4) + 'ms';
      logger.log(stat + ': ' + avg + ' (' + printableTotal + ' / ' + numStats + ')');
    });
    statsTracker = {};
  }