=== request/response, 5000 sequential calls after 2000 warm-up, loopback, JDK 25.0.4.1 ===
gRPC         n=5000   p50=   291.3 us  p99=   1015.3 us  mean=   324.4 us  ~3,083 calls/s
RSocket      n=5000   p50=   300.9 us  p99=   1337.4 us  mean=   350.9 us  ~2,850 calls/s
WebSocket    n=5000   p50=   124.3 us  p99=   1447.8 us  mean=   172.8 us  ~5,786 calls/s
