lower latency at higher throughput with the same number of connections

I am seeing with both [wrk2](https://github.com/giltene/wrk2) and [nighthawk](https://github.com/envoyproxy/nighthawk) load testers that latency is lower when targed/achieved throughput is higher.

## Environment details:

ubuntu 20.04 on aws m5zn.metal with k8s. Deployed with helm.

## Provide the expected results and outputs:

Latencies are expected to be higher when system is under higher request rate.