Info

Does bypassing the prototype chain make a difference?

Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    if (typeof Object.create !== 'function') {
        Object.create = function (o) {
            function F() {}
            F.prototype = o;
            return new F();
        };
    }
    
    var obj1 = {},
        obj2 = Object.create(obj1),
        obj3 = Object.create(obj2),
        obj4 = Object.create(obj3),
        obj5 = Object.create(obj4),
        prop;
  };
</script>

Test runner

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prop = obj5.notARealProperty;

prop = obj5['notARealProperty'];

prop = obj5.hasOwnProperty('notARealProperty');

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Revisions

You can edit these tests or add even more tests to this page by appending /edit to the URL. Here’s a list of current revisions for this page:

• Revision 1: published by Kevin Ennis on 1st February 2012
• Revision 2: published on 31st March 2012

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