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
Comparing various approaches to iterating over an object's enumerable properties and assigning them to a different object using vanilla JS, underscore.
<script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js"></script>
var object = {};
var foo = {};
for (var i = 0; i < 333; ++i) {
object['user'+i] = 'user'+i;
}
Ready to run.
Test | Ops/sec | |
---|---|---|
js while over keys |
| ready |
underscore _.keys filtering |
| ready |
js keys filtering |
| ready |
underscore while over keys |
| ready |
underscore.keys & .each |
| ready |
vanilla for…in |
| ready |
underscore extendOwn |
| ready |
underscore clone |
| ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.