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Visit nrk.neocities.org → On Hacker News Sep 2023 – Nov 2024
Software Engineering 4Systems & Performance 2Security & Privacy 2
As a side-quest I recently decided to write a branchless utf8 decoder utilizing the pext or "parallel extract" instruction. It's compliant with rfc-3629 , meaning that it doesn't just naively decode the code-point but also checks for overlong encoding, surrogate pairs and such. Compiled with gcc -O3 -march=x86-64-v3…
Update Nov 30: I've added a version 2, which makes the benchmarks and design overview section in this article outdated. See the github repo for updated benchmarks.