With Zig and Rust you have to explicitly opt-out with `ReleaseFast` and `unsafe` respectively, that makes a big difference. Rust has the added safety that you cannot (to my knowledge at least) gain performance by opting out with a flag at compile-time, it has to be done with optimized `unsafe` blocks directly in the code.
Lazy C++ is unsafe, lazy Zig is safe-ish, lazy Rust is safe. Given how lazy most programmers are, I consider that a strong argument against C++.
Lazy C++ is unsafe, lazy Zig is safe-ish, lazy Rust is safe. Given how lazy most programmers are, I consider that a strong argument against C++.