Javascript array concat vs push

JavaScript performance comparison

Revision 5 of this test case created by

Preparation code

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/prototype/1/prototype.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/mootools/1.3/mootools-yui-compressed.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/yui/2.9.0/build/yuiloader/yuiloader-min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/dojo/1/dojo/dojo.xd.js"></script>

      
<script>
Benchmark.prototype.setup = function() {
  var arr1 = []
  var arr2 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 0]

};
</script>

Preparation code output

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
concat
for (i = 10000; i > 0; i--) {
  arr1 = arr1.concat(arr2);
}
pending…
push
for (i = 10000; i > 0; i--) {
  Array.prototype.push.apply(arr1, arr2);
}
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