Object vs Array Growth

JavaScript performance comparison

Test case created by Jamie Olson

Info

What grows fastest?

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    var n = 1000000,i=1,j=1,
        arr = [],
        obj = {}
};
</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
Array Growth
i=n
j=1
while (i) {
  arr[j] = j
  i--;
  j=j*10
}
pending…
Object Growt
i=n
j=1
while (i) {
  obj[j] = j
  i--;
  j=j*10
}
pending…

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

Compare results of other browsers

0 comments

Add a comment