it's written in go, same as haven, and it's based off relayer instead of khatru, which i think does stupid things with the concurrency, way too much of it in eventstore libraries

i completely rewrote the entire go-nostr library as well, everything is way faster, you can see here:

https://github.com/mleku/nostrbench

it's got the fastest JSON and binary encoder you can get... i have no idea what strfry's data encoding performance is like but i doubt it could be much faster than this 

 also, it already has a simple access control system based on the follow and mute lists of designated npubs, called "owners"

all muted npubs their events can't be stored on the relay and only the follows of the owners are allowed to access and must use auth