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

localStorage in versus hasOwnProperty

Benchmark created on November 23, 2011

Setup

localStorage.setItem('jsperfaccesscheck', 'foo');

Test runner

Ready to run.

Testing in
Test		Ops/sec
in existing	`'jsperfaccesscheck' in localStorage;`	ready
hasOwnProperty existing	`localStorage.hasOwnProperty('jsperfaccesscheck');`	ready
in not existing	`'jsperfaccesschecknot' in localStorage;`	ready
hasOwnProperty not existing	`localStorage.hasOwnProperty('jsperfaccesschecknot');`	ready

Revisions

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

Revision 1: published on November 23, 2011