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bpo-44337: Improve LOAD_ATTR specialization (GH-26759)

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* Specialize obj.__class__ with LOAD_ATTR_SLOT

* Specialize instance attribute lookup with attribute on class, provided attribute on class is not an overriding descriptor.

* Add stat for how many times the unquickened instruction has executed.
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Mark Shannon 2021-06-21 11:49:21 +01:00 • committed by GitHub
parent 82e5c28af7
commit fb68791a26
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 179 additions and 72 deletions
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Python/ceval.c
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@ -2805,6 +2805,7 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, PyFrameObject *f, int throwflag)
case TARGET(LOAD_GLOBAL): {
PREDICTED(LOAD_GLOBAL);
STAT_INC(LOAD_GLOBAL, unquickened);
PyObject *name = GETITEM(names, oparg);
PyObject *v;
if (PyDict_CheckExact(GLOBALS())
@ -3273,6 +3274,7 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, PyFrameObject *f, int throwflag)
case TARGET(LOAD_ATTR): {
PREDICTED(LOAD_ATTR);
STAT_INC(LOAD_ATTR, unquickened);
PyObject *name = GETITEM(names, oparg);
PyObject *owner = TOP();
PyObject *res = PyObject_GetAttr(owner, name);