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

test property exists

Benchmark created on

Setup

const hero = {
  name: 'Batman'
};

Test runner

Ready to run.

Testing in
Test		Ops/sec
hasOwnProperty	`hero.hasOwnProperty('name') hero.hasOwnProperty('realName')`	ready
in	`'name' in hero 'realName' in hero`	ready
undefined	`hero.name === undefined hero.realName === undefined`	ready

Revisions

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

Revision 1: published on