javascript对象范围和性能

Question

我是JavaScript新手。 我不知道哪一个代码块比其他代码块更好（基于性能）。 我最近一直在学习JavaScript opps一个月。

利用范围链

解决嵌套函数问题

var myObject = {
myProperty: 'I can see the light',
myMethod : function(){
    var that = this; // store a reference to this (i.e. myObject) in myMethod scope
    var helperFunction = function() { // child function
    // logs 'I can see the light' via scope chain because that = this
    console.log(that.myProperty); // logs 'I can see the light'
    //console.log(this); // logs window object, if we don't use "that"
    }();
}
}
myObject.myMethod(); // invoke myMethod



var myObject = (function(wn){

  return {

    myProperty: 'I can see the light',
    myMethod : function(){

      var helperFunction = function() { 
        console.log(wn.myObject.myProperty); // logs 'I can see the light'

      }();
    }
  }

}(this));
myObject.myMethod(); // invoke myMethod