This one does the same thing but with beeps, with higher pitch for heavier DOM updates. It’s not as nice as the geiger click but I’ve found it more useful for figuring out exactly where the UI is slow.
That’s pretty nice and intuitive. The panning is heavy as expected, the emoji picker surprisingly quiet. But something is seriously wrong with the context menus.
I'd love one for React-native, might look into making one if I don't find any :D
I think in case of React the core idea is simple. For example I would love something like this for Rails ActiveRecord to help you find n+1's by sound