for loop length cache

JavaScript performance comparison

Revision 7 of this test case created

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    var array = new Array(1000);
};
</script>

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Testing in unknown unknown
Test Ops/sec
no cache
for(var i = 0; i<array.length; i++) {}
pending…
cache
for(var i = 0, l = array.length; i<l; i++) {}
pending…
backwards, normal
for(var i = array.length-1; i>=0; i--) {}
pending…
backwards, terse
for(var i = array.length; i--;) {}
pending…

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