I made a quick and dirty userscript that displays a “Performance” graph on all user pages. For example, mine looks like this:
Image may be NSFW.
Clik here to view.
The script can be found here.
To install in Chrome, download the script, go to Tools | Extensions, and drag the downloaded script into the page. To install in Firefox, use Greasemonkey. To install in other browsers, do something else.
Let me know how it works for you guys.