Better request/response benchmark

[pipermerriam]

What was wrong?

the request/response benchmarks would be better if the reporting occurred on the Driver side and it reported round trip, or if it reported on both sides of the request/response side so we knew both the 1/2 and full round trip times (and ideally the computed metric of the response time).

How can it be fixed?

Adjust how the driver and workers operate.