jsPerf.app is an online JavaScript performance benchmark test runner & jsperf.com mirror. It is a complete rewrite in homage to the once excellent jsperf.com now with hopefully a more modern & maintainable codebase.

jsperf.com URLs are mirrored at the same path, e.g:

https://jsperf.com/negative-modulo/2

Can be accessed at:

https://jsperf.app/negative-modulo/2

Split/Join or Replace JS String

Benchmark created by Eric Pascarello on October 2, 2011

Preparation HTML

<script>
  var reComma = /,/g;
  var nums = "1";
  for(var i=2;i<1000;i++){
   nums += "," + i;
  }
  
</script>

Test runner

Ready to run.

Testing in
Test		Ops/sec
reg exp	`var spaced = nums.replace(reComma, ", ");`	ready
split join	`var spaced = nums.split(",").join(", ");`	ready

Revisions

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

Revision 1: published by Eric Pascarello on October 2, 2011