concat vs join

JavaScript performance comparison

Revision 2 of this test case created by

Preparation code


      
      <script>
Benchmark.prototype.setup = function() {
  var list = [];
  for(var i=0; i<10000; i++) {
      list.push(i);
  }

};
</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
var str = '';
for(var i=0; i<10000; i++) {
    str += list[i];
}
pending…
join
var str = list.join('');
pending…
join+add
var str = [];
for(var i=0; i<10000; i++) {
    str.push(i);
}
str.join('')
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