Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    var x = undefined,
        y = true;
  };
</script>

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typeof x === "undefined";
typeof y === "undefined";

x === undefined;
y === 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 by Alex Percsi on 25th May 2012
• Revision 2: published by LJHarb on 25th May 2012
• Revision 3: published by Jay Phelps on 3rd June 2012
• Revision 4: published by Callum on 17th August 2012
• Revision 5: published by Callum on 17th August 2012

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