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
Different methods of getting time in JavaScript gives the different performance results in browsers. The http://jsperf.com/gettime-vs-now-0/7 clearly shows, that the winners are Date.now() (Chrome and Opera) and window.performance.now() (Firefox and Internet Explorer). By testing the overhead of declaring a function that returns either Date.now() or performance.now() it's clear that you can try to use different method depending on the browser a user uses. But it would require a browser sniffing, which is not the most elegant solution.
var perf = window.performance;
function dateNow() {
return Date.now();
}
function perfNow() {
return perf.now();
}
var t1;
Ready to run.
| Test | Ops/sec | |
|---|---|---|
| Date.now() | | ready |
| performance.now() | | ready |
| Date.now() function | | ready |
| performance.now() function | | ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.