Performance of Array vs. Object

JavaScript performance comparison

Revision 161 of this test case created by

Preparation code


      
      <script>
Benchmark.prototype.setup = function() {
  var arr = [],
    i,
    obj = {};
  for (i = 0; i < 10000; i += 1) {
    var o = {
      payload: i
    };
    arr.push(o);
    obj[i] = o;
  }

};
</script>

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
Array Performance
var sum = 0;
var x = 0;
var y = arr.length;

for (; x < y; x++) {
  sum += arr[x].payload
}
pending…
Using of
var sum = 0;
for (var el of arr) {
  sum += el.payload
}
pending…
Using in
var sum = 0;
for (var el in obj) {
  sum += el.payload
}
pending…
Using Object.keys()
var sum = 0;
var keys = Object.keys(obj);
var i = 0;
var j = keys.length;

for (; i < j; i++) {
  sum += obj[keys[i]].payload
}
pending…

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Revisions

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