benchmarking bidirectional streaming APIs

[dharmjit]

Hi, I just discovered this awesome tool and started exploring it as a replacement for an internal in-house tool for benchmarking bidirectional streaming APIs. I have created a small service(PingPong) with a bidirectional streaming API(Ping). When testing it with ghz with a config fileloadtest-config.json, I am getting below results and I am not sure about the EOF error for all Sends in the Error distribution results. Thanks!

$ ghz --config=./loadtest-config.json

Summary:
  Count:        118812
  Total:        15.00 s
  Slowest:      0 ns
  Fastest:      0 ns
  Average:      0.07 ms
  Requests/sec: 7921.52

Response time histogram:

Latency distribution:

Status code distribution:
  [Unknown]   118812 responses   

Error distribution:
  [118812]   rpc error: code = Unknown desc = EOF

loadtest-config.json

{
    "proto": "proto/pingpong.proto",
    "call": "pingpong.PingPong.Ping",
    "insecure": true,
    "total": 1,
    "concurrency": 1,
    "stream-call-duration": "10s",
    "data": [{"message":"{{randomString 8 }}"}],
    "import-paths": [
        "proto"
    ],
    "max-duration": "15s",
    "host": "127.0.0.1:8888"
}