I've recently seen the class being used in the wild so I guess it was time to properly publish it.
Since the beginnings I've always had a
FPS meter class, really basic, but had to be there. Then
Carlos came along with one with a nice visualizer of the performance and then I saw
Alternativa's one and I though that was the best approach. However, it had some issues, the speed of the graph seemed a bit pointless as the history was of 1 second or so.

So I improved my own one on the direction of the latest, but having a graph history of about 10/15 seconds, having a clearer picture of how your app/site is performing.
Theo came along and helped with the graph visualisation too and then it went public.
Anyway... if you need a tiny and easy
FPS/MS/MEM control panel, feel free to use it :)
http://code.google.com/p/mrdoob/wiki/stats
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