On a 16-core AMD EPYC server, a parallel prime-sieving workload runs 3.7x faster than the equivalent multiprocessing version, with 40% less memory overhead.
Python 3.13 ships with a --disable-gil that produces a GIL-free interpreter (a.k.a. "free-threaded Python"). This remains experimental and not recommended for production. python news today release 3.13 november 2025
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