Late-year benchmarks show that the 3.13 JIT provides a 5% to 15% performance boost for CPU-bound tasks compared to Python 3.12.
November has seen a surge in "thread-safety" audits across the PyPI ecosystem. If you are using C-extensions, this is the month many maintainers are flagging legacy code as "non-thread-safe" under the 3.13 free-threaded build. JIT Compiler Performance Gains
