Validating UTF-8 In Less Than One Instruction Per Byte

6 Oct 2020  ·  John Keiser, Daniel Lemire ·

The majority of text is stored in UTF-8, which must be validated on ingestion. We present the lookup algorithm, which outperforms UTF-8 validation routines used in many libraries and languages by more than 10 times using commonly available SIMD instructions. To ensure reproducibility, our work is freely available as open source software.

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