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

x = x || dflt vs x || (x = dflt) (v2)

Revision 2 of this benchmark created on October 3, 2011

Preparation HTML

<script>
  a = 0
  b = 1
  dflt = 1
</script>

Test runner

Ready to run.

Testing in
Test		Ops/sec
x = x \|\| dflt	`a == a \|\| dflt b == b \|\| dflt`	ready
x \|\| (x = dflt)	`a == dflt \|\| a b == dflt \|\| b`	ready

Revisions

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

Revision 1: published by JeanHuguesRobert on March 20, 2011
Revision 2: published on October 3, 2011
Revision 3: published on October 3, 2011