caching length

JavaScript performance comparison

Revision 129 of this test case created by Robin

Preparation code


      
      <script>
Benchmark.prototype.setup = function() {
  var arr=[];
  for(var i=0;i<1000;i++) {
    arr[i]=Math.random();
  }

};
</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
cached
for(var i=0,len=arr.length;i<len;i++) {
  arr[i]*=2;
}
pending…
not cached
for(var i=0;i<arr.length;i++) {
  arr[i]*=2;
}
pending…
My Test
var i = arr.length;
while(i--){
  arr[i]*=2;
};
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