array vs. object access

JavaScript performance comparison

Test case created by starwed

Info

array vs. object access

Preparation code

<script>
  var a = [];
  a[0] = 42;
  a.id = 42;
</script>
<script>
Benchmark.prototype.setup = function() {
    var i, x = 0;
};
</script>

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Testing in unknown unknown
Test Ops/sec
array index
for (i = 0; i < 100; i++) {
  x += a[0]
}
pending…
property
for (i = 0; i < 100; i++) {
  x += a.id
}
pending…

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