Ruby and Python's standard implementations make use of a Global Interpreter Lock. Justin James explains the major advantages and downsides of the GIL mechanism.

Python vs Java If you’re a Python dev who can’t wait until 2026 for strong typing and multicore threading support, there are other options. One of Python’s strengths is its ability to invoke code ...

The global interpreter lock is both a key component of the Python runtime and a major obstacle to multithreading. These are the plans to get around it or get rid of it.