gRPC performance benchmark

[din...@wepay.com]

Hi,

Using gRPC Java RouteGuide Example available in github, I was running a gRPC server and a REST server which contains gRPC client. Using this setup, I tried to run AB (Apache Bench) tool to find the performance of unary and server side streaming calls.

I noticed that the response time becomes low as we increase the concurrency level (especially more significant change for server side streaming calls). I would like to if there is any recommended best practices or this is and expected increase in latency.

FYI, I created a single ManagedChannel instance for the client and startup time. I have also attached the performace graphs.

Regards,

Dinesh P S

[Carl Mastrangelo]

I'm not sure ab is a very good benchmark tool.  It used to be years ago, but I haven't seen it used in a long time.  Also, by using it you avoid the deserialization that a real client would do.  

[din...@wepay.com]

We are using ab to hit REST endpoints. 

ab ->   REST server (GRPC Client) -> GRPC server

In this case the protobuf deserialization is happening on the REST server using the real client. AB is not performing the protobuf deserialization. 

[robert engels]

I would think it is going to depend heavily on the work the gRPC service method does, not GRPC itself. Since the REST/HTTP protocol is already less efficient than the gRPC one - the former is going to dominate it in terms of relative performance.

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