[wredue]

Listen dude. I’m not going to argue about this:

Immutability is measurably slower. Full stop.

The fact that you can come up with silly, overly simplistic, non-idiomatic anecdotes showing that sometimes a compiler will prefer calculation doesn’t change that. It is a commonly known fact in low level programming that just because you’re calculating something doesn’t make it slower by default.

When Haskell devs can produce a game engine that doesn’t look like PS2 on a 4090, we can chat again about how immutability is supposedly not slow.