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Labeled matches: why is this not in every regex engine?
The author shows how to label tokens (dates, money, emails, etc.) with a single regex pass using extended operators (`&` for intersection, `~` for complement) in the resharp library. A tiny benchmark compares 10 patterns against spaCy’s NER, reporting ~1.9 GB/s (≈4500× faster) on 8 threads. The post lists the concrete patterns and argues that for deterministic, regular‑language entities regex can…