It's not about the compiler, it's about the language. Rust, and C++ as well, have features that generally speaking require the compiler to do a significant amou

It's not about the compiler, it's about the language. Rust, and C++ as well, have features that generally speaking require the compiler to do a significant amount of work to compile the program. Plain old C can easily compile more than an order of magnitude faster than an equivalent idiomatic Rust or C++ program, even if compiled with the same compiler suite (gcc).