Fastest array loops in Javascript

JavaScript performance comparison

Revision 326 of this test case created by

Preparation code

<script>
  // Populate the base array
  var arr = [];
  for (var i = 0; i < 1000; i++) {
    arr[i] = 'value' + i;
  }

  function someFn(ix) {
    return ix * 5 + 1 / 3 * 8;
  }
</script>
    

Test runner

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
For loop, basic
for (var i = 0; i < arr.length; i++) {
  someFn(i);
}
pending…
For loop, JSLint
var i;
for (i = 0; i < arr.length; i += 1) {
    someFn(i);
}
pending…
For loop, JSLint and cached
var i,
    len = arr.length;
for (i = 0; i < len; i += 1) {
    someFn(i);
}
pending…

pending…

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