loop-types-ecmascript

JavaScript performance comparison

Test case created by Andreas Göbel

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    var arr = [1,2,3,4,5];
};
</script>

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Testing in unknown unknown
Test Ops/sec
normal loop loop
for(var i = 0; i < arr.length; i++) {
}
 
pending…
for loop cached
for(var i = 0, len = arr.length; i < len; i++) {
}
 
pending…
rev while loop
var len = arr.length;
while( len-- ) {
}
pending…
for loop 2in1
for (var i=arr.length; i--;) {
}
pending…
for loop getting element
for (var i=0, each; each = arr[i]; i++) {
}
pending…

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