this post was submitted on 12 Jun 2023
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From what I understand the Lemmy backend doesn't support user specific websocket updates. So your client can subscribe to updates about ALL new posts coming in, but it can't get updates on only your subscribed communities.
To add to that. It would not surprise me if that is the most efficient way of doing things. Let the client handle all of the filtering. Sure it increases traffic, but it reduces server CPU load greatly.
Oh yes, it'll decrease the server load with the sacrifice of network traffic and client load. It's a hard balancing act to get right.