Javascript array concat vs push

JavaScript performance comparison

Revision 228 of this test case created by J

Preparation code


      
      <script>
Benchmark.prototype.setup = function() {
  var arr1 = Array.from(Array(50000), (x,i) => i + 1)
  var arr2 = Array.from(Array(50000), (x,i) => i - 1)
  

};
</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
push.apply
const tmpArr1 = [...arr1];
Array.prototype.push.apply(tmpArr1, arr2);
if (tmpArr1.length != 100000) throw new Error("too long!");
pending…
concat
let  tmpArr1 = [...arr1];
tmpArr1 = tmpArr1.concat(arr2);
if (tmpArr1.length != 100000) throw new Error("too long!");
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