[issue36876] [subinterpreters] Global C variables are a problem

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

More and more C extensions are converted to multiphase initialization API (PEP 489) and their global variables are moved into a new module state.

bpo-39465 will make _Py_IDENTIFIER compatible with subinterpreters.

See also bpo-40521 for caches like free lists and Unicode interned strings.

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