In javascript we can change properties of constant object. So if I have some factory in AngularJs defined as below
      myApp.factory('sampleFactor', function() {
        var sampleFactoryVar =  {
         setFoobar: function(foo){
             //perform some operations
             return foo;
         },
         getFoobar:function(){
             //perform some operations
         }
       };
       return sampleFactoryVar;
     });
In this factory if I will be declaring sampleFactoryVar as const will it make any significant impact on performance ? 
Please consider sampleFactoryVar is holding lots of properties.
 
     
    