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
Tests how quickly you can iterate through multiple elements on the page using getElementsByTagName("a") vs. querySelector("a").
<ul>
<li><a href="#">Item</a></li>
<li><a href="#">Item</a></li>
<li><a href="#">Item</a></li>
<li><a href="#">Item</a></li>
<li><a href="#">Item</a></li>
</ul>
<script>
var list, result, i, len;
</script>
Ready to run.
Test | Ops/sec | |
---|---|---|
Using getElementsByTagName() |
| ready |
Using querySelector() |
| ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.