function log(text) {
  var div = document.createElement("div");
  div.textContent = text;
  document.body.appendChild(div);
};

function intList(n) {
  var i, result = [];
  for(i = 0; i < n; i++) result.push(i);
  return result;
};

function time(f) {
  var r, startTime, endTime;
  startTime = Date.now();
  r = f();
  endTime = Date.now();
  log("time = " + (endTime - startTime) + "ms");
  return r;
};

function randInt(a, b) {
  return a+Math.floor(Math.random()*(b-a));
};

function shuffle(a) {
  var i, idx, temp;
  for(i = 0; i < a.length-1; i++) {
    idx = randInt(i, a.length);
    temp = a[i]; a[i] = a[idx]; a[idx] = temp;
  }
};

time(function() {
    nums = intList(1000000);
});

time(function() {
    shuffle(nums);
});
for(var i = 0; i < 10; i++) log(nums[i]);

time(function() {
    nums.sort(function(a, b) {return a-b});
});
for(var i = 0; i < 10; i++) log(nums[i]);