Maybe, but where it is compiled? On the device itself, right? If that's the case - what kind of compiler we are talking here? A really good optimizing compiler

Maybe, but where it is compiled? On the device itself, right? If that's the case - what kind of compiler we are talking here? A really good optimizing compiler would probably use a lot of memory, and cpu clocks. I'm not expert, so I might be totally wrong about it. Just thinking out loud.