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
How much faster is the HTML5 document.head
DOM tree accessor compared to its old-school variant, document.getElementsByTagName('head')[0]
?
<script>
document.head || (document.head = document.getElementsByTagName('head')[0]);
var headList = document.getElementsByTagName('head');
</script>
Ready to run.
Test | Ops/sec | |
---|---|---|
document.getElementsByTagName('head')[0] |
| ready |
document.head |
| ready |
querySelector |
| ready |
Live nodeList |
| ready |
XPath |
| ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.