Jiffy

Jiffy is an end-to-end real-world web page instrumentation and measurement suite. Jiffy was built and is maintained by the WhitePages.com team.

Jiffy allows developers to:

• measure individual pieces of page rendering (script load, AJAX execution, page load, etc.) on every client
• report those measurements and other metadata to a web server
• aggregate web server logs into a database
• generate reports