Simple Javascript function profiling

profile.js

// Pass a function to profile and optionally the number of times to run
function profile(test, times) {
  var start = new Date().getTime();
  if (times === undefined) {
    times = 100;
  }

  for (i = 0; i < times; ++i) { 
    test(); 
  }; 
  var end = new Date().getTime(); 
  var time = end - start; 
  print('took: ' + time);
}

// Example
profile(function () {
 1 + 2;
}, 10000)