My subsequent comment acknowledges that JIT means more than compilation at runtime. In .NET desktop, it means compilation of all CIL to native on every run, jus

My subsequent comment acknowledges that JIT means more than compilation at runtime. In .NET desktop, it means compilation of all CIL to native on every run, just before execution. To me, that's just executing the second pass of a compiler at launch time, but Anders Hejlsberg says it's JIT[1], and I'm not going to argue :) [1]: https://stackoverflow.com/a/1255828/4158187 https://stackoverflow.com/a/1255828/4158187