That's not the only use of SIMD in the crate (e.g. see https://github.com/hsivonen/encoding_rs/blob/e98a2096ab09c9262b2928fa22f7fcec9c7a2a00/src/simd_funcs.rs h

That's not the only use of SIMD in the crate (e.g. see https://github.com/hsivonen/encoding_rs/blob/e98a2096ab09c9262b2928fa22f7fcec9c7a2a00/src/simd_funcs.rs https://github.com/hsivonen/encoding_rs/blob/e98a2096ab09c92...), but I haven't looked into exactly where/how it's used further.