Very curious to read your code doing it. Thought of a very similar approach but never had the time. Are you keeping it somewhere?

I only ever got it to a proof of concept. The back end worked as advertised, the issue was that there are too many bugs in WMI so collecting that many performance counters had weird side effects.

Google was doing something comparable internally and this spawned some fun blog titles like “I have 64 cores but I can’t even move my mouse cursor.”