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

checking for neg 1

Benchmark created by checking for -1 on September 21, 2011

Preparation HTML

<script>
  var test = -1;
</script>

Test runner

Ready to run.

Testing in
Test		Ops/sec
regular check	`if(test === -1){}`	ready
bitshift check	`if(~test){}`	ready
double equal	`if(test == -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 checking for -1 on September 21, 2011