JS inheritance test (v2)

Revision 2 of this benchmark created by Jeremy Ashkenas on

Description

Demonstrating two different methods of inheritance. Brought about by this article in hacker news:

Wanted to examine it based on my own coding usage (a couple levels of single inheritance).

I was using crockford's method (so called "real" prototypical inheritance), but according to Ashkenas this is a frowned upon model these days. The claim is that its much slower. In my test below it seems to be faster, but I'm fairly sure I'm missing something.

Both tests are building an end object with two prototype methods from two different parents.

End objects

Preparation HTML

<script>
  MY = {};
  
  // Used for crockford inheritance
  MY.create = function(o) {
   function F() {};
   F.prototype = o;
   return new F();
  };
  
  // setup for Crockford inheritance
  MY.realbase = {
   monkey: function() {
    console.log("monkey")
   }
  }
  
  // setup for Ashkenas Inheritance
  MY.base = function() {};
  MY.base.prototype.monkey = function() {
   console.log("monkey")
  }
</script>

Test runner

Ready to run.

Testing in
TestOps/sec
Crockford Inheritance
window.newobject = MY.create(MY.realbase);
ready
Ashkenas Inheritance
window.newobject = new MY.base;
ready

Revisions

You can edit these tests or add more tests to this page by appending /edit to the URL.