Open-source tool to measure the performance of your web app directly from your users' browsers.
<script src="bucky.js" data-bucky-host="/bucky" data-bucky-page data-bucky-requests></script>
Add just one script tag to your page, configure the host, and it just works. Bucky tracks every AJAX request and page load.
Since Bucky uses the latest performance API, you get access to tons of metrics at sub-millisecond precision. You should know how users are experiencing your site.
Bucky works with your existing Graphite or OpenTSDB database, so you control your data.