Fastest array loops in Javascript

JavaScript performance comparison

Revision 624 of this test case created by Jose Zuniga Marin

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
Full cached for
var i =0;
var len = arr.length;

for (i; i < len; i++) {
  someFn(i)
}
pending…
Full cached for with manual counter
var i =0;
var len = arr.length;

for (i; i < len) {
  someFn(i)
  i = i + 1;
}
pending…

Revisions

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