Real Multithreading Is Coming to Python

• nogil

  31 2,853 5.7 Python

  Multithreaded Python without the GIL

Important to note that this is different from the nogil project ( https://github.com/colesbury/nogil ) - this is about the feature that's landing soon in Python 3.12 which will allow multiple Python sub-interpreters each with their own GIL - hence enabling Python code to run multi-threaded in the same process, albeit with a fair amount of extra work to co-ordinate between those different interpreters.

The tutorial itself is fantastic - it's not an easy feature to try out right now but I got there by following the step-by-step instructions.

Also interesting is this project, linked to from the end of the tutorial: https://github.com/jsbueno/extrainterpreters

Posted my own set of short notes on my blog: https://simonwillison.net/2023/May/15/per-interpreter-gils/

• extrainterpreters

  3 100 7.4 Python

  Utilities for using Python's PEP 554 subinterpreters

Important to note that this is different from the nogil project ( https://github.com/colesbury/nogil ) - this is about the feature that's landing soon in Python 3.12 which will allow multiple Python sub-interpreters each with their own GIL - hence enabling Python code to run multi-threaded in the same process, albeit with a fair amount of extra work to co-ordinate between those different interpreters.

The tutorial itself is fantastic - it's not an easy feature to try out right now but I got there by following the step-by-step instructions.

Also interesting is this project, linked to from the end of the tutorial: https://github.com/jsbueno/extrainterpreters

Posted my own set of short notes on my blog: https://simonwillison.net/2023/May/15/per-interpreter-gils/

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