Without binary protocol option there is no speed. JSON is low entry barrier but it's atrocious.

Relays should serve JSON AND CBOR, simple client flag can achieve this.

We can't be serious about speed without it.

nostr:note1le3wcpdycl7nlxjxj6rrk4j2psq3khj6s8dkjekhsgza4wlfl4zsuvj08r