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

.(dot) vs [](square bracket) (v2)

Revision 2 of this benchmark created by Kyle Simpson on August 7, 2010

Preparation HTML

<script>
  var doc = "document";
</script>

Test runner

Ready to run.

Testing in
Test		Ops/sec
.	`var a = window.document;`	ready
[] with literal	`var a = window["document"];`	ready
[] with variable	`var a = window[doc];`	ready

Revisions

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

Revision 1: published by JavaScript Nazi on August 6, 2010
Revision 2: published by Kyle Simpson on August 7, 2010
Revision 5: published by Michael Norman on November 19, 2010
Revision 6: published by blocks-vs-functions on September 3, 2011
Revision 7: published on November 9, 2011
Revision 8: published by mah0x211 on February 16, 2012
Revision 9: published by mah0x211 on February 18, 2012
Revision 13: published on July 5, 2012
Revision 15: published on April 17, 2013
Revision 18: published by foo on February 10, 2015