I'm not for forcing inefficient safe data structures. You are pretending that this is a dichotomy when the vast majority of the time it isn't. You are completely misinterpreting what I said. I'm for safe data structures. And the data structures described are huge footguns. I made no point about efficiency.
> He also hates static typing
I mean, in OOP there are many reasons to dislike it. It's harder to extend and test. Calls to such functions within other methods are a nuisance to remove. E.g. `Instant.now()`.
In a cloud DB webservice what will save you is having a good tracing/debugging story. From it, it will be easy to see E2E performance. Sure, some things will translate, but going SIMD optimized layout on a class, that will have to talk to DB across the ocean is a fool's errands.
To optimize you must have a good target and make sure you are measuring correctly.