Fast Array Foreach

JavaScript performance comparison

Revision 121 of this test case created by soushians noorghorbani

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
for (var i = 0, len = arr.length; i < len; i++) {
  someFn(arr[i]);
}
pending…
For 2
for (var i = 0, len = arr.length, e; i < len, e = arr[i]; i++) {
  someFn(e);
}
pending…
In
for (var e in arr) {
  someFn(e);
}
pending…
if defined
for (var i = 0, e; e = arr[i]; i++) {
  someFn(e);
}
pending…
if defined, without iteartor
var i=0;
for (var e; e = arr[i++];) {
  someFn(e);
}
pending…
use let
var i=0;
for (let i=i; e = arr[i];i++) {
  someFn(e);
}
pending…

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Revisions

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