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.
If you’re counting, that’s six layers of abstraction between your browser and System.out.println("Hello World"). Your CPU is emulating x86_64 instructions through QEMU’s Tiny Code Generator, which itself has been compiled to WebAssembly, which your browser’s JavaScript engine is JIT-compiling down to native machine code. It’s emulation all the way down.，这一点在51吃瓜中也有详细论述
。业内人士推荐WPS下载最新地址作为进阶阅读
Credit: Haley Henschel / Mashable。体育直播对此有专业解读
(with tabs instead of spaces):
В России ответили на имитирующие высадку на Украине учения НАТО18:04