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

type of a variable (v10)

Revision 10 of this benchmark created by Dillon on November 12, 2014

Setup

var obj = {
      one: 1
    };

Test runner

Ready to run.

Testing in
Test		Ops/sec
obj typeof ==	`typeof obj == "object";`	ready
obj typeof ===	`typeof obj === "object";`	ready
obj instanceof	`obj instanceof Object;`	ready
toString	`obj.toString() === "[object Object]";`	ready

Revisions

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

Revision 1: published on August 26, 2010
Revision 2: published on March 23, 2012
Revision 3: published by Damion Grimfield on April 19, 2012
Revision 4: published by Sergey Kononenko on May 4, 2012
Revision 5: published on June 18, 2012
Revision 8: published by alexz on August 23, 2014
Revision 9: published on September 14, 2014
Revision 10: published by Dillon on November 12, 2014
Revision 12: published by Dracco on May 19, 2015
Revision 13: published by Peter on August 8, 2015
Revision 14: published by Dylan on August 14, 2015
Revision 15: published on June 9, 2023