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

Object structure-change (v3)

Revision 3 of this benchmark created by bj on February 6, 2015

Setup

var object = {x : 2, y: 5}

Test runner

Ready to run.

Testing in
Test		Ops/sec
delete	`delete object.x;`	ready
undefined	`object.x = undefined`	ready
null	`object.x = null`	ready

Revisions

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

Revision 1: published by Mahdi on January 18, 2015
Revision 2: published on January 24, 2015
Revision 3: published by bj on February 6, 2015