We have been working on a pub/sub project using gRPC in C++, we are publish messages to gRPC server with unary RPC, and receive the message with server streaming RPC call. We implement the server with cq-based async way, just like the qps test server in grpc repo, and the client will issue the unary RPC with a fix interval. We run the test on a 48 core server machine with CPU E5-2650 2.20gHZ. The test code is here: perf test repo