Portable SIMD is not that useful for string parsing as far as I know - tbl is different from pshufb in ways that usually make tbl cost an additional operation f

Portable SIMD is not that useful for string parsing as far as I know - tbl is different from pshufb in ways that usually make tbl cost an additional operation for text parsing, moving things across lanes in AVX2 or AVX-512 can be fiddly (unless you just want vcompress or a masked store, then AVX-512 has you covered) Edit: After looking over the docs, it's not clear that Rust's portable SIMD exposes tbl or pshufb *at all*, which would basically prevent it from being used for string parsing.