What’s the added value of GenServer in this example? If read caching is what you’re looking for, I think ETS would be a much better idea. Using GenServers to represent objects makes your application complicated and brittle. For instance, since you’re using casts, in a high load situation the message queues can keep growing until the VM runs out of memory.
It’s similar to the discussion on To spawn, or not to spawn? and the Functional Web Development with Elixir, OTP, and Phoenix book thread.
