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How does that relate to the scenario and what of the templates?

> The middle approach would be implementing the infrastructure

That's great if you're implementing but it doesn't really work when you're coming in to an existing infrastructure (or codebase) that other people manage.

I mean sure you would want to do that, but the above was very specific situation with existing feature set and an imminent novel problem.

To spend time on thinking about performance, and then not write the code.