They might well depend on available hardware, given the specific nature of the problem (multiple processes and the level of concurrency within). Ultimately the

They might well depend on available hardware, given the specific nature of the problem (multiple processes and the level of concurrency within). Ultimately the source of truth is actual end-user performance. If you’re not measuring that directly, then you’re hoping what you’re doing is a proxy for end-user performance. Sometimes a suitable proxy is available. Often, it’s not.