12000/month to run that free thing ^

that price is a minimal 2 core server, if that, probably some some single-hosted shared Docker container network. Isn't there encryption keys? It's either a resource issue or a need for multithreading, or writing in a different, more efficient language, such as Golang, the easiest-to-speed ratio. I'm not sure if there's multithreading, but that's needed to make anything most efficient. AI ...

Yeehaw!