The autovectorizer works quite well in llvm with all the aliasing guarantees rust gives it. Especially now fastmath hit so wide types aren't necessary anymore. I don't need unsafe or crates that use unsafe to beat the performance of c++. If you are doing something very specific with niche intrinsics llvm can't use, then maybe I'd have to use unsafe. But I don't run into that. Rust is faster for the same reasons it avoids UB. Also the Kool aid comes in multiple flavors!