Loop vs map vs forEach

JavaScript performance comparison

Revision 7 of this test case created by

Preparation code


      
      <script>
Benchmark.prototype.setup = function() {
  var range = [];
  
  for (var i = 0; i < 10000; i++) {
      range.push({ name: "value" }, { value: 5 });
  }

};
</script>

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
Loop different
var result = [], i, rangeLength;

for (i = 0, rangeLength = range.length; i < rangeLength; i += 1) {
    var obj = {}, item = range[i];
    obj[item.name] = item.value;
    result.push(obj);
}
pending…
Map
var result = range.map(function (item) {
  var obj = {}; 
  obj[item.name] = item.value; 
  return obj;
});
pending…
forEach
var result = [];

range.forEach(function (item){
    var obj = {};
    obj[item.name] = item.value;
    result.push(obj)
});
pending…
Map modified
var result = [];

range.map(function (item) { 
    var obj = {};
    obj[item.name] = item.value;
    result.push(obj);
});
pending…
Loop popular
var result = [];

for (var i = 0; i < range.length; i++) {
    var obj = {}, item = range[i];
    obj[item.name] = item.value;
    result.push(obj);
}
pending…

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