Broadcast to socket without channel

[vlad.grb]

I believe yes

Socket topic subscription overhead

You can’t subscribe in UserSocket.connect since it’s in the transport process. To get what you want, have a UserChannel with topic user:[user_id]. You could then multiplex conversations by subscribing the channel join to conversation:[convo_id] Subscriptions are ets entries, so they are very cheap. Additionally, we pool the pubsub servers, so the underlying genserver call for subscribe is pooled.

Can you please push your code somewhere?