Experienced users reach for the profiler, perhaps the frame debugger.
Again, opinions and theory don’t matter.
At a minimum, measure first, don’t guess.
What matters is how your specific software runs on your specific hardware.
And since your original post mentioned object pools, just beware:
The costs and issues associated with object pooling / pools:
In very rare extremely-high-count object circumstances I have seen small benefits from pooling.
In MOST circumstances, object pooling is a source of complexity, bugs and edge cases while not giving any measurable benefit.