Why should I use gRPC instead of IPC / Simple websocket?

I'm sketching an architecture for a micro services system, planned to run currently on one machine (maybe distribution in the future). The system will be composed of services written in both Node.js, GO and might be Java. Both node.js and Java will need to pass instructions and receive results from the GO server.

Now, I'm trying to decide should I use IPC pipe or ramp up on gRPC and protobuff and use them.

via YafimK