Fast Array Foreach

JavaScript performance comparison

Revision 224 of this test case created by

Preparation code


      
      <script>
Benchmark.prototype.setup = function() {
    // Populate the base array
    var arr = [];
    for (var i = 0; i < 1000; i++) {
      arr[i] = i;
    }
  
    function someFn(i) {
      return i * 3 * 8;
    }

};
</script>

Test runner

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
Array.ForEach
arr.forEach(function (item){
  someFn(item);
})
pending…
For increase
for (var i = 0, len = arr.length; i < len; i++) {
  someFn(arr[i]);
}
pending…
For decrease
for (var i = arr.length; i--;) {
  someFn(arr[i]);
}
pending…
For decrease, with var
var len = arr.length;
for (var i = len; i--;) {
  someFn(arr[i]);
}
pending…
While decrease
var i = arr.length;
while (i--) {
   someFn(arr[i]);
}
pending…
while method
function myWhileMethod(array_attr) {

var i = array_attr.length;
while (i--) {
   someFn(array_attr[i]);
}

}

myWhileMethod(arr)
pending…
array.map
arr.map(function (item){
  someFn(item);
})
pending…

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Revisions

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