[Python-Dev] PEP 554 v2 (new "interpreters" module)

Eric Snow ericsnowcurrently at gmail.com
Tue Sep 12 17:04:51 EDT 2017

On Fri, Sep 8, 2017 at 8:54 PM, Michel Desmoulin
<desmoulinmichel at gmail.com> wrote:
> Le 09/09/2017 à 01:28, Stefan Krah a écrit :
>> Still, the argument "who uses subinterpreters?" of course still remains.
> For now, nobody. But if we expose it and web frameworks manage to create
> workers as fast as multiprocessing and as cheap as threading, you will
> find a lot of people starting to want to use it.

Note that subinterpreters share the GIL currently, and the objects you
can pass between interpreters will be quite restricted initially.
However, the ultimate goal is to stop sharing the GIL between
interpreters and to broaden the types that can be passed between
interpreters.  Regardless, the isolation inherent to subinterpreters
provides benefits immediately.


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