I think the main performance bottleneck would be CPU usage due to signing events. The NSecSigner itself (from Nostrify, used in knox) is benchmarked. I think you should be fine with it. But when I need much high performance I will throw together a wasm signer like this one: https://gitlab.com/soapbox-pub/eclipse/-/blob/main/src/NSecSignerWasm.ts?ref_type=heads We could switch knox to that if needed, as well as distribute load across multiple cores. It would need modifications, but I still think you're unlikely to hit that limit.