GitHub speeds code‑search case‑folding to >45 GiB/s per core
GitHub’s code search now folds every byte at over 45 GiB/s on a single core by swapping early‑exit logic for a branch‑free loop and byte‑space arithmetic. The open‑source Rust crate ‘casefold’ handles the ASCII fast‑path without branches, slashing latency for indexing 480 TB of source across 180 M repositories.