Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    var obj = {},
        arr = [],
        count = 0;
    for (var i = 0; i < 1000; i++) {
      arr.push(i);
      obj[i] = 1;
    }
    
    
    function in_array(needle, haystack) {
      for (var i = 0, maxi = haystack.length; i < maxi; ++i) {
        if (haystack[i] == needle) {
          return true;
        }
      }
      return false;
    }
  };
</script>

Test runner

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if (in_array(1, arr)) {
  count++;
}

if (in_array(5, arr)) {
  count++;
}

if (in_array(20, arr)) {
  count++;
}

if (obj[1]) {
  count++;
}

if (obj[5]) {
  count++;
}

if (obj[20]) {
  count++;
}

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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 1st July 2012
• Revision 2: published on 2nd July 2012
• Revision 3: published on 1st August 2012
• Revision 4: published by Rob Edgar on 27th September 2012

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