That's exactly what I'm saying. If you're writing an inventory service, that service might have eg endpoints to add/remove stock and others for querying stock levels from a customer facing {something}. Same logical concern, vastly different priorities. You would want that in the same developer view
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Hyper-micro optimisation at that stage.
If the querying is a separate thing from performance angle, I'd expect those to not be run together, separated by a message/event.
There's way too many "it depends" in there though
For everytime I can see "run it all at once locally" I end up with better options