There are people working on language features that will get Rust closer to parity with C++ for numerical computing, most prominently "const generics", which wil

There are people working on language features that will get Rust closer to parity with C++ for numerical computing, most prominently "const generics", which will make it more ergonomic to write numeric libraries (see C++'s Eigen) that use static array sizes. This will ultimately be important for how aggressively the compiler can optimize the code, via eliminating bounds checks, etc.