Is this code for this experiment available? publish_mutation is blocking, in that it does not return until all subscriber documents have been run and individually published. If you have 1000 subscribers and their docs take 10 milliseconds each to run (which would be quite fast) then that’s still 10 seconds worth of delay.
This is fundamentally very different from Phoenix PubSub. If you have 1000 subscribers to a topic, publishing to that topic just involves basically a send to every subscriber, there is not a large body of code to execute for each subscriber.
EDIT: As a tiny note I’d make sure to use the Absinthe.Schema.PersistentTerm — absinthe v1.11.0 schema backend as that has improved copying characteristics. I don’t think that’s going to be a game changer though.
