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Has the Python GIL been slain?

The GIL.

What is the GIL?

Avoiding the GIL in CPython

from multiprocessing import Process

def f(name):
print 'hello', name

if __name__ == '__main__':
p = Process(target=f, args=('bob',))

PEP554 and the death of the GIL?

What if there was a better way?

That looks inefficient

Pickle v5 and Sub-Interpreters PoC

That sure looks like a lot of boilerplate

How much overhead does a sub-interpreter have?

  • modules in the __main__ namespace and importlib
  • the sys dictionary containing
  • builtin functions ( print() , assert etc)
  • threads
  • core configuration

What about asyncio?

Sounds great, ship it!

Conclusion: Is the GIL dead?




Elijah McClain, George Floyd, Eric Garner, Breonna Taylor, Ahmaud Arbery, Michael Brown, Oscar Grant, Atatiana Jefferson, Tamir Rice, Bettie Jones, Botham Jean

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Anthony Shaw

Group Director of Talent at Dimension Data, father, Christian, Python Software Foundation Fellow, Apache Foundation Member.