I think it depends on if your design is conducive to performance or not and this is the cross-purpose here. If you've architected a bunch of end points that ar

I think it depends on if your design is conducive to performance or not and this is the cross-purpose here. If you've architected a bunch of end points that are chatty and jump layers in a weave of a tangled mess or built an app infrastructure that never isolates expensive operations and just arbitrarily inlines them, then you'll struggle to optimise it later. But if your architecture is relatively sane and your data model apt for the features at hand and those on the horizon then finding hotspots and improving performance many times fold is totally doable later.