Ruby bindings to RE2, a "fast, safe, thread-friendly alternative to backtracking regular expression engines like those used in PCRE, Perl, and Python". - Release 2.27.0: Concurrent matching without the Ruby Global VM Lock · mudge/re2

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The re2 Ruby gem version 2.27.0 releases concurrent matching by releasing the Ruby Global VM Lock (GVL) during regex operations including RE2::Regexp matching, RE2::Set compiled matching, and replace/extract operations. This allows other threads to run concurrently during potentially expensive matches, resulting in near-linear scaling with thread count. Benchmark results on an M1 Max show 8-thread matching completing in ~0.11s vs ~0.83s in the previous version. To support this, RE2::Regexp objects are now frozen on initialization, RE2::Set objects are frozen when compiled, and the extension is marked safe for Ractors. The GVL release is not available on Windows due to mutex conflicts with Abseil.