Transcoding unicode characters with AVX-512 instructions
- Intel includes in its recent processors a powerful set of instructions capable of processing 512-bit registers with a single instruction (AVX-512). Some of these instructions have no equivalent in earlier instruction sets. We leverage these instructions to efficiently transcode strings between the most common formats: UTF-8 and UTF-16. With our novel algorithms, we are often twice as fast as the previous best solutions. For example, we transcode Chinese text from UTF-8 to UTF-16 at more than 5 GiB s−1 using fewer than 2 CPU instructions per character. To ensure reproducibility, we make our software freely available as an open-source library. Our library is part of the popular Node.js JavaScript runtime.
Author: | Robert Clausecker, Daniel Lemire |
---|---|
Document Type: | Article |
Parent Title (English): | Software: Practice and Experience |
Volume: | 53 |
Issue: | 12 |
First Page: | 2430 |
Last Page: | 2462 |
Publisher: | John Wiley & Sons Ltd. |
Year of first publication: | 2023 |
DOI: | https://doi.org/10.1002/spe.3261 |