In addition to the other discussion. It's important to measure outcomes and not just look at the cpu meter...
At the same load, how did latency look for A vs B.
What was throughput and latency at maximum load like for A vs B. For whichever one had the smaller max throughput, what did latency look like for the other option.
For bonus points while testing: is there another observable metric to indicate available capacity, if cpu % free is less useful.
Comments
In addition to the other discussion. It's important to measure outcomes and not just look at the cpu meter...
At the same load, how did latency look for A vs B.
What was throughput and latency at maximum load like for A vs B. For whichever one had the smaller max throughput, what did latency look like for the other option.
For bonus points while testing: is there another observable metric to indicate available capacity, if cpu % free is less useful.