Loop vs map vs forEach vs for in

JavaScript performance comparison

Revision 22 of this test case created by

Preparation code


      
      <script>
Benchmark.prototype.setup = function() {
  var range = [];
  
  for (var i = 0; i < 10000; i++) {
      range.push(i);
  }

};
</script>

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
Map
range.map(function(val) {
    val * 2;
});
pending…
Loop
for (var i = 0; i < range.length; i++) {
    range[i] * 2;
}
pending…
forEach
range.forEach(function(val) {
    val * 2;
});
pending…
for + let
for (let i = 0; i < range.length; i++) {
    range[i] * 2;
}
pending…
for in
for (var i in range) {
    range[i] * 2;
}
pending…

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Revisions

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