最终你会发现，它完成了一个 Demo 级的表演，但为了让它真正把这笔账报掉，你得花 10 倍的时间去写配置文件、去手动排错。它只完成了“动作”，没有完成“任务”。
Lean already produces performance comparable to Haskell and OCaml. When higher performance is essential, Lean models can be translated into efficient imperative code embedded in Lean, with clean semantics and without C’s undefined behavior. We are actively working on closing the remaining gap for performance-critical code. The real comparison is not Lean versus C. It is verified code versus unverified code.
，这一点在17c 一起草官网中也有详细论述
Master Generative AI for Developer Productivity With Pieces
Costly conservation?