Akka grpc performance in benchmarks

[jrudolph (Johannes Rudolph)]

@jrudolph

taskset -c 4-15 ./ghz --proto=proto/helloworld/helloworld.proto --call=helloworld.Greeter.SayHello --insecure --concurrency=50 --connections=5 --duration 300s --cpus=7 --data-file payload/100B 127.0.0.1:50051

Ah, this is using much less concurrency / connections.