for vs forEach

JavaScript performance comparison

Revision 84 of this test case created by

Preparation code


      
      <script>
Benchmark.prototype.setup = function() {
  var i = 0,
    value = 0,
    length = 100000,
    values = [],
    sum = 0,
    context = values;
  
  
  for (i = 0; i < length; i++) {
    values[i] = Math.random();
  }
  
  function add(val) {
    sum += val;
  }

};
</script>

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
forEach closure
values.forEach(function(val) {
  sum += val;
});
pending…
while
i = 0
while(i < length){
  sum += values[i];
  i += 1;
}
pending…
for ... in
for (i in values) {
  sum += values[i];
}
pending…
forEach
values.forEach(add);
pending…
for
for (i = 0; i < length; i += 1) {
  sum += values[i];
}
pending…

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