Array length performance

JavaScript performance comparison

Test case created by Josh

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    arr = [];
    for (var i = 0; i < 10000000; i++) arr.push(i);
};
</script>

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Testing in unknown unknown
Test Ops/sec
Length property
for (var i = 0; i < arr.length; i++);
pending…
Variable
var len = arr.length;
for (var i = 0; i < len; i++);
pending…

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