In production you generally want your code to not be 1.5x-2x slower than C/C++, otherwise people will ditch your whole language with all its other benefits in pursuit of performance.
There's a lot of safe but slow languages, Rust is trying incredibly hard to be a safe language that is still seen to be in that general C/C++ ballpark of performance.
There's a lot of safe but slow languages, Rust is trying incredibly hard to be a safe language that is still seen to be in that general C/C++ ballpark of performance.