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

replace vs substring for hash

Benchmark created by Jacob Covington on June 8, 2011

Preparation HTML

<script>
  var hash = window.location.hash;
</script>

Test runner

Ready to run.

Testing in
Test		Ops/sec
Replace	`var test = hash.replace('#', '');`	ready
Substring	`var test = hash.substring(1);`	ready

Revisions

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

Revision 1: published by Jacob Covington on June 8, 2011