Add more detailed metrics ?

[bojand]

Add more metrics such as duration of different parts and sizes.

The gRPC stats provides additional types for instrumenting detailed events such as ConnBegin, InHeader, InTrailer, etc, along with providing size data. It may be useful to collect this information in the results and report. But I am really not sure what info specifically would be useful?

[manastare-kasada]

Suggestion: We could have a generic stats/percentile disctribution for the response size like we currently have for response duration (avg, max, p90, p95, etc).