Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    var range = function(min, max, diff) {
        "use strict";
        var returnList = [];
        i = min;
        if (!diff) {
          diff = 1;
        }
        for (; i < max; i = i + diff) {
          returnList.push(i);
        }
        return returnList;
        },
        obj = {},
        data = range(1, 10000),
        i = 0;
    for (; i < data.length; i += 1) {
      obj[i] = i + 1;
    }
  };
</script>

Test runner

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for (var a in obj) {
  return (a + "->" + obj[a]);
}

var a;
for (a in obj) {
  return (a + "->" + obj[a]);
}

Object.keys(obj).forEach(function(key) {
  return (key + "->" + obj[key]);
});

var keys = Object.keys(obj),
    len = keys.length;
for (; i < len; i += 1) {
  return (keys[i] + "->" + obj[keys[i]]);
}

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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 2: published on 5th September 2012
• Revision 6: published by Alexander Kolarski on 29th March 2013
• Revision 7: published by Tim 1 week ago

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