Manager API - how expenisive?

I have written a proxy server that sits between Asterisk and client applications. I have decided to do that after I saw the amount of events that is pushed through to each client. My question is if I have a client connecting with “Events: off” is it still expensive? Yes it probably depends on how many Actions you execute but I would suspect it to be a lot less stressful on the server. The reason why I ask is because I am designing a proxy server with one connection listening to events and pushing it through to clients depending on what they subscribed for. It also have a pool of say 10 connections which has Events: off and is executing request from cleints on demand. Will that hammer Asterisk?

It would have been nice if one could turn certain events on or off in Asterisks.

Thanks.
Gerhard.