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authorNeal Norwitz <nnorwitz@gmail.com>2007-02-25 19:44:48 (GMT)
committerNeal Norwitz <nnorwitz@gmail.com>2007-02-25 19:44:48 (GMT)
commitee3a1b5244e60566c5d5c8f6a1ea4b381de99f1c (patch)
treead52a17fc77530870a575107a7cea9c27de17606 /Include/intobject.h
parent5a3e812444609329b30be837a08c11269d917b72 (diff)
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Variation of patch # 1624059 to speed up checking if an object is a subclass
of some of the common builtin types. Use a bit in tp_flags for each common builtin type. Check the bit to determine if any instance is a subclass of these common types. The check avoids a function call and O(n) search of the base classes. The check is done in the various Py*_Check macros rather than calling PyType_IsSubtype(). All the bits are set in tp_flags when the type is declared in the Objects/*object.c files because PyType_Ready() is not called for all the types. Should PyType_Ready() be called for all types? If so and the change is made, the changes to the Objects/*object.c files can be reverted (remove setting the tp_flags). Objects/typeobject.c would also have to be modified to add conditions for Py*_CheckExact() in addition to each the PyType_IsSubtype check.
Diffstat (limited to 'Include/intobject.h')
-rw-r--r--Include/intobject.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/Include/intobject.h b/Include/intobject.h
index 1f4846e..51d3e1b 100644
--- a/Include/intobject.h
+++ b/Include/intobject.h
@@ -27,7 +27,8 @@ typedef struct {
PyAPI_DATA(PyTypeObject) PyInt_Type;
-#define PyInt_Check(op) PyObject_TypeCheck(op, &PyInt_Type)
+#define PyInt_Check(op) \
+ PyType_FastSubclass((op)->ob_type, Py_TPFLAGS_INT_SUBCLASS)
#define PyInt_CheckExact(op) ((op)->ob_type == &PyInt_Type)
PyAPI_FUNC(PyObject *) PyInt_FromString(char*, char**, int);