Fastest Array Loops

JavaScript performance comparison

Revision 52 of this test case created by

Preparation code


      
      <script>
Benchmark.prototype.setup = function() {
  var arr = [],
      a = 0;
  
  for (; a < 1000; a += 1) {
    arr[a] = a;
  }
  
  function doStuff(x) {
    return (x + x);
  }

};
</script>

Test runner

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
While, length --
var l = arr.length;
while (l--) {
  doStuff(arr[l]);
}
pending…
For, i < length
var i = 0,
    l = arr.length;
for (; i < l; i++) {
  doStuff(arr[i]);
}
pending…
For, i !== length
var i = 0,
    l = arr.length;
for (; i !== l; i++) {
  doStuff(arr[i]);
}
pending…

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