Debunk method calls in loop conditions

JavaScript performance comparison

Revision 7 of this test case created

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    var my_array = [];
    for (var i = 0; i < 10; i++) {
      my_array.push(i);
    }
};
</script>

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Testing in unknown unknown
Test Ops/sec
"slow"
for (var i = 0; i < my_array.length; i++) {};
pending…
"fast"
var length = my_array.length;
for (var i = 0; i < length; i++) {};
pending…

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