Lazy Object Construction in JavaScript. Create Lazy versions (unitialized) of your objects, and let the consumer initialize them right when he really needs them.

LazyObjectConstruction.js

function Lazy(type){
  var _arguments = [].slice.call(arguments, 1);
	this.create = function(){
		var inst = Object.create(type.prototype);
		//need this extra inst2 to follow the correct behaviour in case the constructor returns something
		var inst2 = type.apply(inst, _arguments);
		return inst2 || inst;
	};
}

//usage:
var p = new Lazy(Person, "Xuan", 37);

//first time the consumer checks whether the object has been created
p = p instanceof Lazy ? p.create() : p;
//further on we can use it as a normal object
console.log(p.sayHi());