perf‑regexes is a tiny JavaScript library that ships a set of highly‑optimized regular expressions for common source‑code and text‑processing tasks—HTML comments, JavaScript strings/comments/regex literals, line‑ending handling, empty‑line detection, etc. It’s aimed at developers who need fast, reliable pattern matching (e.g., linters, formatters, code‑cleanup tools) and can be used both in Node.js and directly in the browser.