Does creating functions consume more memory

Question

// Case A
function Constructor() {
  this.foo = function() {
    ...
  };
  ...
}

// vs 
// Case B
function Constructor() {
  ...
};

Constructor.prototype.foo = fu         


        

Answer 1

The javascript interpreters aren't optimizing prototype objects either. Its merely a case of there only being one of them per type (that multiple instances reference). Constructors, on the other hand, create new instances and the methods defined within them. So by definition, this really isn't an issue of interpreter 'optimization' but of simply understanding what's taking place.

On a side note, if the interpreter were to try and consolidate instance methods you would run into issues if you ever decided to change the value of one in a particular instance (I would prefer that headache not be added to the language) :)