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Sam Gross
d891b2bbd1
Add `_Py_type_getattro_stackref`, a variant of type attribute lookup that returns `_PyStackRef` instead of `PyObject*`. This allows returning deferred references in the free-threaded build, reducing reference count contention when accessing type attributes. This significantly improves scaling of namedtuple instantiation across multiple threads. * Add blurb * Rename PyObject_GetAttrStackRef to _PyObject_GetAttrStackRef * Apply suggestion from @vstinner Co-authored-by: Victor Stinner <vstinner@python.org> * Apply suggestion from @vstinner Co-authored-by: Victor Stinner <vstinner@python.org> * format * Update Include/internal/pycore_function.h Co-authored-by: Victor Stinner <vstinner@python.org> --------- Co-authored-by: Victor Stinner <vstinner@python.org>
The Python C API ================ The C API is divided into these sections: 1. ``Include/``: Limited API 2. ``Include/cpython/``: CPython implementation details 3. ``Include/cpython/``, names with the ``PyUnstable_`` prefix: API that can change between minor releases 4. ``Include/internal/``, and any name with ``_`` prefix: The internal API Information on changing the C API is available `in the developer guide`_ .. _in the developer guide: https://devguide.python.org/c-api/