loop

JavaScript performance comparison

Test case created

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    var arr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10],
        sum = 0;
};
</script>

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Testing in unknown unknown
Test Ops/sec
for
for (var i = 0, len = arr.length; i < len; ++i) {
    sum += arr[i];
}
pending…
for in
for (var key in arr) {
    sum += arr[key];
}
pending…

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