Good question. Working with Python objects in PyO3 requires holding the GIL. With MessagePack, Python serializes to bytes, hands them off, and Rust works comple

Good question. Working with Python objects in PyO3 requires holding the GIL. With MessagePack, Python serializes to bytes, hands them off, and Rust works completely GIL-free from that point. Same on the way back. So the GIL is held only for the brief serde step, not during SQL generation or execution.