Implement GRPC performance benchmarking service

[arianvp]

Official gRPC implementations are benchmarked against a standard benchmarking suite.

https://grpc.io/docs/guides/benchmarking/

https://github.com/grpc/grpc/tree/master/src/proto/grpc/testing

It would be useful to implement this benchmarking suite for mu-haskell as well; to see how well it fares against implementations in other languages and to catch performance regression issues.

[serras]

mu-haskell in this case is just a thin layer over https://github.com/haskell-grpc-native/http2-grpc-haskell. Maybe we should try to write a benchmarking suite against that at first step?

[arianvp]

Given we need to implement specific protobuf services, I thought it would be more ergonomic to put them in mu-haskell as that's where the protobuf generation code lives right?

Also I'm willing to give a shot at this.

[serras]

Feel free to try and send a PR. This will also help us enormously to see if somebody else outside of the maintainer group can work with the given API :)

[arianvp]

Exactly my thought :)