=== server streaming, 50000 messages on one connection, loopback ===
gRPC          50,000 msgs in  1.116 s  =      44,801 msgs/s  ( 22.32 us each)
RSocket       50,000 msgs in  0.702 s  =      71,175 msgs/s  ( 14.05 us each)
WebSocket     50,000 msgs in  0.459 s  =     109,022 msgs/s  (  9.17 us each)