bpo-40521: Make frame free list per-interpreter #20638
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Each interpreter now has its own frame free list: * Move frame free list into PyInterpreterState. * Add _Py_frame_state structure. * Add tstate parameter to _PyFrame_ClearFreeList() and _PyFrame_Fini(). * Remove "#if PyFrame_MAXFREELIST > 0". * Remove "#ifdef EXPERIMENTAL_ISOLATED_SUBINTERPRETERS"
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Each interpreter now has its own frame free list:
and _PyFrame_Fini().
https://bugs.python.org/issue40521