The future of Python web services looks GIL-free | Hacker News

C code needs to be updated to be safe in a GIL free execution environment. It is a lot of work! The pervasive problem is that mutable data structures (lists, dict etc) could change at any arbitrary point while the C code is working with them, and the reference count for others could drop to zero if *anyone* is using a borrowed reference (common for performance in CPython APIs). Previously the GIL

[misshiki]

Python 3.14でGILフリーは現実になったが、C拡張ライブラリ対応が進むまでは「部分的なGILフリー」。Web系では並列処理の恩恵が大きい一方、科学計算（AI・機械学習など）はNumPyやPyTorch対応進行中で安定運用には時間が要る。