A resource that would benefit the entire community is a set of ballpark figures for what kind of performance is "normal" given a particular hardware + data volume. I know this is a hard problem because there is so much variation across workloads, but I think even order of magnitude ballparks would be useful. For example, it could say things like:

task: msg queue

software: kafka

hardware: m7i.xlarge (vCPUs: 4 Memory: 16 GiB)

payload: 2kb / msg

possible performance: ### - #### msgs / second

etc…

So many times I've found myself wondering: is this thing behaving within an order of magnitude of a correctly setup version so that I can decide whether I should leave it alone or spend more time on it.