A snapped padlock connected to a CPU usage monitor with all twelve cores at 100 percent, illustrating the Python GIL being disabled
PPaul Hill
pythonpython gilfree threadingconcurrencymultithreadingpython performance
Python

Python GIL: How to Turn It Off and Benchmark the Difference

14 min read• Last edited Sep 12, 2026

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About The Author

Paul Hill

Paul Hill is a systems engineer and technology educator focused on building practical, modern training platforms. He is the founder of Server Academy, where he teaches infrastructure, cloud, and automation skills with an emphasis on real-world application.

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