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

```
function l( x ) {
let y = 0;
while ( x > 1 ) {
y += 1;
x >>= 1;
}
return y;
}
function l2( x ) {
return Math.floor( Math.log2(x) );
}
function l3( x ) {
return 31 - Math.clz32( x );
}
```

Ready to run.

Test | Ops/sec | |
---|---|---|

exr |
| ready |

js |
| ready |

clz |
| ready |

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

- Revision 1: published on