Javascript array concat vs push

JavaScript performance comparison

Revision 94 of this test case created by

Preparation code


      
      <script>
Benchmark.prototype.setup = function() {
  var arr1 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 0]
  var arr2 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 0]
  var arr3 = []
  var arr4 = new Array(100000);

};
</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
concat
for (i = 10000; i > 0; i--) {
  arr3 = arr1.concat(arr2);
}
pending…
push
for (i = 10000; i > 0; i--) {
  arr1.push.apply(arr1, arr2);
}
pending…
push self
for (i = 10000; i > 0; i--) {
  arr1.push(arr2);
}
pending…
prealloc
for (i = 10000; i > 0; i--) {
  arr4.push.apply(arr4,arr1);
}
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