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

+new Date vs Date.now() vs performance.now() (v20)

Revision 20 of this benchmark created by Igor Minar on May 23, 2014

Description

https://twitter.com/jaffathecake/status/306706682552143872

jaffathecake: Avoid "+new Date" to generate timestamps during animation. Use "Date.now()" or "performance.now()" instead http://t.co/Hle0qzxWeZ

Setup

var perf = performance;
    var i;
    var pNow = performance.now;
    var dNow = Date.now;

Test runner

Ready to run.

Testing in
Test		Ops/sec
Date.now	`Date.now();`	ready
+new Date()	`+new Date();`	ready
performance.now()	`performance.now()`	ready
new Date().getTime()	`new Date().getTime()`	ready
new Date().valueOf()	`new Date().valueOf()`	ready
Cached performance object	`perf.now()`	ready
counter	`i = i + 1;`	ready
pNow()	`pNow()`	ready
dNow()	`dNow()`	ready

Revisions

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

Revision 1: published by Noxoc on February 27, 2013
Revision 2: published on February 27, 2013
Revision 3: published by Oliver Clevont on March 5, 2013
Revision 5: published on March 20, 2013
Revision 6: published by Boris on April 12, 2013
Revision 7: published by Country on April 18, 2013
Revision 8: published on May 22, 2013
Revision 9: published by Mitch on May 22, 2013
Revision 11: published on July 16, 2013
Revision 12: published on August 8, 2013
Revision 13: published on August 8, 2013
Revision 15: published on October 15, 2013
Revision 16: published on January 2, 2014
Revision 17: published on March 29, 2014
Revision 18: published on May 13, 2014
Revision 20: published by Igor Minar on May 23, 2014
Revision 21: published by Igor Minar on May 28, 2014
Revision 22: published on June 25, 2014
Revision 23: published on June 26, 2014
Revision 24: published on June 26, 2014
Revision 25: published on July 1, 2014
Revision 28: published by Jerry on October 15, 2014