Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    o1 = Object.create(null);
    o2 = Object.create(null);
    o1.a = o2.a = 1;
    
    Object.freeze(o2);
  };
</script>

Test runner

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if('a' in o1);

if('a' in o2);

if('b' in o1);

if('b' in o2);

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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 8th December 2011
• Revision 2: published on 8th December 2011
• Revision 3: published on 15th March 2012
• Revision 5: published on 22nd August 2012
• Revision 9: published by Ruben Verborgh on 14th January 2013

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