https://www.pistack.xyz/tags/pattern-matching/ Recent content in Pattern-Matching on Pi Stack Hugo en-us Mon, 22 Jun 2026 00:00:00 +0000 https://www.pistack.xyz/posts/2026-06-22-regular-expression-engine-libraries-re2-pcre2-hyperscan-oniguruma/ Mon, 22 Jun 2026 00:00:00 +0000 https://www.pistack.xyz/posts/2026-06-22-regular-expression-engine-libraries-re2-pcre2-hyperscan-oniguruma/ <p>Regular expressions are one of the most widely used tools in software engineering, powering everything from log parsing and input validation to network intrusion detection and search engines. But not all regex engines are created equal. The underlying algorithm — backtracking versus finite automaton — determines whether your regex will complete in microseconds or hang indefinitely on certain inputs.</p>