Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    var a = {hello2:'world'}
  };
</script>

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a['hello2'] !== undefined;

'hello2' in a;

a.hello2 !== undefined;

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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 on 27th December 2012
• Revision 2: published on 3rd January 2013

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