Empty array

JavaScript performance comparison

Revision 87 of this test case created by Jasper

Preparation code

<script>
function clearArray(arr){
   var l = arr.length;
   while( l-- ){
      arr.pop();
   }
   return arr;
}
</script>
      
<script>
Benchmark.prototype.setup = function() {
  var arr = [];
  var len = (Math.random() * 1000)|0;
  while( len-- ){
  arr.push({ a: Math.random(), b: ""+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
length
arr.length = 0;
pending…
splice
arr.splice(0, arr.length);
pending…
pop
while (arr.length > 0) {
  arr.pop();
}
pending…
shift
while (arr.length > 0) {
  arr.shift();
}
pending…
new array
arr = [];
pending…
pop clear (in function)
clearArray( arr );
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