Maybe that's what you're looking for?

this is what i’m using now. actor pattern with fanout, but i don’t like that I have ~200 coroutines waiting. I know it’s ok to run 1million coroutines but I’m looking for another way to do this

I'm not quite sure about your actual domain, but if those 200 coroutines represent 200 calls to

execute

from legitmate users of that function, I don't see how you can reduce that number other than just plainly discarding them.