GH-115776: Allow any fixed sized object to have inline values #123192
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iritkatriel
approved these changes
Aug 21, 2024
Good point. |
markshannon
commented
Aug 21, 2024
|
It looks like this PR broke a test in the mypyc transpiler: python/mypy#17973 |
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Currently only objects with
Py_TYPE(obj)->tp_basicsize == sizeof(PyObject)are allowed to have inline values.This PR changes that to allow any object where all instances of the class have the same size to have inline values.
Performance is in the noise, but the stats show a clear reduction in the number of
LOAD_ATTRs executed.Oddly, the number of
LOAD_ATTR_INSTANCE_VALUEs executed is roughly unchanged, the new specializations being for class attributes. Fixing the shadowing issue should improve things further and show an increase inLOAD_ATTR_INSTANCE_VALUEs.