benchmark

function bench(method, args, description) {
  var start, duration,
    max = Number.MIN_VALUE,
    min = Number.MAX_VALUE,
    average = 0;
  for(var i = 0; i< 10; i++) {
    start = Date.now();
    var index = method(args);
    duration = Date.now() - start;
    max = Math.max(max, duration);
    min = Math.min(min, duration);
    average += duration;
  }
  console.log('%s: average=%dms, min = %dms, max = %dms', description, average/10.0, min, max);
}