Fastest for loops

JavaScript performance comparison

Test case created by

Preparation code


      
      <script>
Benchmark.prototype.setup = function() {
  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

Warning! For accurate results, please disable Firebug before running the tests. (Why?)

Java applet disabled.

Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
For len defined in loop
for (var i = 0, len = arr.length; i < len; i++) {
  someFn(arr[i]);
}
pending…
For increase, without len predefined
for (var i = 0; i < arr.length; i++) {
  someFn(arr[i]);
}
pending…
For increase, var predefined outside loop
var len = arr.length;
for (var i = 0; i < len; i++) {
  someFn(arr[i]);
}
pending…

Compare results of other browsers

Revisions

You can edit these tests or add even more tests to this page by appending /edit to the URL.

0 Comments