Show HN: Stool – a client-based alternative to jsPerf

Stool is just a benchmarking utility for comparing JavaScript snippets. For each test case you enter a name and the code you want to run.

You can definitely code in your own editor, and copy/paste the JS into the text box.

Note however the tool is not meant for large amounts of JavaScript (e.g. not for comparing entire files), but rather for comparing specific atomic implementations (comparing sort algorithms, methods of query DOM elements, etc).