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
There is no easy way to replace the entire contents of an array in JavaScript. This compares the performance of splice to push.
var a = Array(1e4 + 1).join('a').split(),
b = Array(1e4 + 1).join('b').split();
Ready to run.
Test | Ops/sec | |
---|---|---|
Splice 1 |
| ready |
Splice 2 |
| ready |
Push |
| ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.