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
These test if a property exists in an object. The boolean syntax is often used, but can lead to wrong results (a property with a value of false wouldn't be detected, for example).
<script>
var obj = {
a: 1
};
</script>
Ready to run.
Test | Ops/sec | |
---|---|---|
in operator |
| ready |
boolean value |
| ready |
hasOwnProperty |
| ready |
boolean value 2 |
| ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.