for vs while substraction

JavaScript performance comparison

Test case created by Tomas

Preparation code

<script>

        Benchmark.prototype.setup = function() {

          
  var a = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 ]; a = a.concat(a, a, a, a, a, a, a, a);

        
  };


      
</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
(function(a) {
  var sum = 0;
  var i = a.length;
  for (;i--;) {
    sum += a[i];
  }
  return sum;
})(a);
pending…
while
(function(a) {
  var sum = 0;
  var i = a.length;
  while (i--) {
    sum += a[i];
  }
  return sum;
})(a);
pending…

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

0 Comments