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Python 3.14 and GIL in CPython

  • CPython uses GIL to prevent data races and memory corruption in multithreading.
  • GIL allows only one thread execution at a time, impacting CPU-bound tasks negatively.
  • CPython's GIL-free build in Python 3.14 beta improves performance for CPU-bound tasks.
  • GIL limitation remains for I/O-bound tasks while CPU-bound tasks benefit from multithreading.
  • CPython GIL supports I/O tasks well but hampers CPU tasks, alternative is multi-process approach.

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