The linked implementation assumes mostly ASCII. It doesn't use SIMD. SIMD in Rus...

		scottlamb on May 16, 2018 \| parent \| context \| favorite \| on: Validating UTF-8 strings using as little as 0.7 cy... The linked implementation assumes mostly ASCII. It doesn't use SIMD. SIMD in Rust is a work in progress - the next version (1.27) will stabilize x86-64-specific SIMD intrinsics. There's an rfc (https://github.com/rust-lang/rfcs/pull/2366) for portable SIMD types.