Thanks to visit codestin.com
Credit goes to github.com

Skip to content

gh-102213: Optimizing the Performance of __getattr__ #102213 #102248

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 3 commits into from
Mar 11, 2023
Merged

gh-102213: Optimizing the Performance of __getattr__ #102213 #102248

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
1a4b2e8
Fix wangxiang-hz/getattr_optimization #102213
wangxiang-hz Feb 25, 2023
970566a
📜🤖 Added by blurb_it.
blurb-it[bot] Feb 26, 2023
f95d844
optimize implementation according to Fidget-Spinner's advise
wangxiang-hz Mar 10, 2023
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
1 change: 1 addition & 0 deletions Include/internal/pycore_object.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -353,6 +353,7 @@ extern void _PyObject_FreeInstanceAttributes(PyObject *obj);
extern int _PyObject_IsInstanceDictEmpty(PyObject *);
extern int _PyType_HasSubclasses(PyTypeObject *);
extern PyObject* _PyType_GetSubclasses(PyTypeObject *);
extern PyObject* _PyObject_GenericTryGetAttr(PyObject *, PyObject *);

// Access macro to the members which are floating "behind" the object
static inline PyMemberDef* _PyHeapType_GET_MEMBERS(PyHeapTypeObject *etype) {
Expand Down
1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Core and Builtins/2023-02-26-13-12-55.gh-issue-102213.fTH8X7.rst
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
Fix performance loss when accessing an object's attributes with ``__getattr__`` defined.
6 changes: 6 additions & 0 deletions Objects/object.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1364,6 +1364,12 @@ PyObject_GenericGetAttr(PyObject *obj, PyObject *name)
return _PyObject_GenericGetAttrWithDict(obj, name, NULL, 0);
}

PyObject *
_PyObject_GenericTryGetAttr(PyObject *obj, PyObject *name)
{
return _PyObject_GenericGetAttrWithDict(obj, name, NULL, 1);
}

int
_PyObject_GenericSetAttrWithDict(PyObject *obj, PyObject *name,
PyObject *value, PyObject *dict)
Expand Down
9 changes: 6 additions & 3 deletions Objects/typeobject.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -8248,14 +8248,17 @@ _Py_slot_tp_getattr_hook(PyObject *self, PyObject *name)
(Py_IS_TYPE(getattribute, &PyWrapperDescr_Type) &&
((PyWrapperDescrObject *)getattribute)->d_wrapped ==
(void *)PyObject_GenericGetAttr))
res = PyObject_GenericGetAttr(self, name);
/* finding nothing is reasonable when __getattr__ is defined */
res = _PyObject_GenericTryGetAttr(self, name);
else {
Py_INCREF(getattribute);
res = call_attribute(self, getattribute, name);
Py_DECREF(getattribute);
}
if (res == NULL && PyErr_ExceptionMatches(PyExc_AttributeError)) {
PyErr_Clear();
if (res == NULL) {
if (PyErr_ExceptionMatches(PyExc_AttributeError)) {
PyErr_Clear();
}
res = call_attribute(self, getattr, name);
}
Py_DECREF(getattr);
Expand Down