The recent release of CPython 3.14.0b1 and the commencement of PyCon 2025 underscore significant progress in implementing free-threaded Python. This development is crucial for leveraging the power of multicore CPUs and GPUs, which is hindered in the GIL-enabled environment where parallel algorithms face challenges. The transition to free-threaded builds requires that compiled packages are thoroughly audited to ensure safe functionality, necessitating adaptations to previously acceptable conventions involving global state to support improved parallelism in Python workflows.
Support for free-threaded Python unlocks the full compute power of modern hardware, allowing for better parallel algorithms and performance with multicore CPUs and GPUs.
Packages with compiled code must be audited and fixed to ensure compatibility with the free-threaded build, as structural changes impact the safety of global state usage.
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