I have two services, a backend and an engine. I have the backend and the engine talking on a private railway network both to save on egress fees and because I think it's faster.

I've been running load tests and the tests failed because the private network could only support 13 concurrent websocket connects between the services. I switched to the public network and the number is closer to 25. This makes no sense.

NOTE: I am running 2 duplicates of the engine and the backend each.