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

"Date.now()" vs "new Date()" vs "new Date().getTime()" (v17)

Revision 17 of this benchmark created on September 13, 2024

Test runner

Ready to run.

Testing in
Test		Ops/sec
Date.now()	`Date.now()`	ready
new Date()	`new Date()`	ready
new Date().getTime()	`new Date().getTime()`	ready
performance.now()	`performance.now()`	ready
Date.now() - performance.timing.navigationStart	`Date.now() - performance.timing.navigationStart`	ready

Revisions

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

Revision 1: published on October 11, 2023
Revision 6: published on February 27, 2024
Revision 7: published on February 27, 2024
Revision 9: published on March 27, 2024
Revision 11: published on May 24, 2024
Revision 12: published on May 24, 2024
Revision 15: published on June 26, 2024
Revision 17: published on September 13, 2024
Revision 20: published on November 5, 2024
Revision 22: published on January 5, 2025
Revision 25: published on May 15, 2025