Apologies about the repost, but I sent this message on a weekend and it got zero replies and was quickly buried under Monday chatter. I'm trying one more time. Looking for advice please :-)

I guess you could take a look at

MutableStateFlow

. It would keep the Map you mentioned, updates could be done via the

update()

extension method. That way you don't need the (potentially) blocking

synchronized

and as such also no IO dispatcher I think?