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
Test different methods to convert a number
var str="2147483647";
var sum=0;Ready to run.
| Test | Ops/sec | |
|---|---|---|
| parseInt(str,10) (64 bit float) | | ready |
| Number(str) (64 bit float) | | ready |
| +str (64 bit float) | | ready |
| ~~(1*str) (32 bit integer) | | ready |
| ~~str (32 bit integer) | | ready |
| str << 0 (32 bit integer) | | ready |
| str >> 0 (32 bit integer) | | ready |
| str | 0 (32 bit integer) | | ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.