Examples
Some language implementations that implement a Global Interpreter Lock are CPython, the most widely used implementation of Python, and Ruby MRI, the reference implementation of Ruby (where it is called Global VM Lock).
JVM-based equivalents of these languages (Jython and JRuby) do not use Global Interpreter Locks. IronPython and IronRuby are implemented on top of Microsoft's Dynamic Language Runtime and also avoid using a GIL.
Read more about this topic: Global Interpreter Lock
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