Performance of Array vs. Object

JavaScript performance comparison

Revision 14 of this test case created by vincent piel

Info

After seeing http://jsperf.com/javascript-associative-vs-non-associative-arrays, I thought the test could be improved.

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    var arr = [9, 9],
        obj = {
        one: 9,
        two: 9
        },
        one = 9,
        two = 9;
   
    var sum = 0 ;
};
</script>

Test runner

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Testing in unknown unknown
Test Ops/sec
Array Performance
sum = arr[0] + arr[1];
pending…
Object Performance
sum = obj.one + obj.two;
pending…
Variable performance
sum = one + two;
pending…
Primitive performance
sum = 9 + 9;
pending…

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Revisions

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