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Concerns over the performance of programs written in Python are often overstated — for some use cases, at least. But there is no getting around the problem imposed by the infamous global interpreter lock (GIL), which severely limits the concurrency of multi-threaded Python code. Various efforts to remove the GIL have been made over the years, but none have come anywhere near the point where they would be considered for inclusion into the CPython interpreter. Now, though, Sam Gross has entered the arena with a proof-of-concept implementation that may solve the problem for real.