test.js

test.js

function LinkedList() {
  this._length = 0;
  this._head = null;
  this._tail = null;
}

LinkedList.prototype = {
  add: function (data){
    var node = { data: data, next: null};
    if (this._length == 0) {
      this._head = node;
      this._tail = node;
    } else {
      this._tail.next = node;
      this._tail = node;
    }
    this._length++;
  }
};

var start = Date.now();
var a = new LinkedList();
for (var i = 1; i <= 1e7; i++) {
  a.add(i);
}

var end = Date.now();

var log= (function () {
  if (typeof console === 'object') {
    return function log (txt) {
      //nodejs
      console.log(txt);
    }
  }
  else {
    return function log (txt) {
      //JSC
      print(txt);
    };
  }
})();

log(((end - start) / 1000) + ' s');