iterating-over-arrays-and-objects

JavaScript performance comparison

Revision 6 of this test case created

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    var array = [];
    var object = {};
   
    for (var i = 0; i < 5000; i++) {
      var key = Math.random().toString(36).substring(7);
      var value = Math.random().toString(36).substring(7);
   
      array.push([key, value]);
      object[key] = value;
    };
};
</script>

Test runner

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

Java applet disabled.

Testing in unknown unknown
Test Ops/sec
Iterating over array
for (i = 0; i < array.length; i++) {
  var result;
  result = array[i][0] + array[i][1];
}
pending…
Iterating over object's properties
for(var prop in object) {
  var result;
  //if (object.hasOwnProperty(prop)) {
    result = prop + object.prop;
  //}
}
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. Here’s a list of current revisions for this page:

0 comments

Add a comment