Fast Array Foreach

JavaScript performance comparison

Revision 122 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;
    }
  
  Array.prototype.for=function(a){
        for(var i=0,l=this.length;i<l;i++)a(this[i],i)
      }

};
</script>

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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
for (var i = 0, len = arr.length; i < len; i++) {
  someFn( arr[i] );
}
pending…
Array.prototype.for
arr.for( someFn )
pending…
Array in
var ele;
for(ele in arr){
someFn( ele );
}
pending…

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Revisions

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