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keyobject_richcompare() now uses fast call 

Issue #27128: keyobject_richcompare() now calls _PyObject_FastCall() using a
small stack allocated on the C stack to avoid a temporary tuple.
This commit is contained in:
Victor Stinner 2016-08-19 18:52:35 +02:00
parent 99ee9c70a7
commit f7a4c488b5
1 changed files with 7 additions and 11 deletions
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18
Modules/_functoolsmodule.c
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@ -461,12 +461,12 @@ static PyObject *
keyobject_richcompare(PyObject *ko, PyObject *other, int op)
{
PyObject *res;
PyObject *args;
PyObject *x;
PyObject *y;
PyObject *compare;
PyObject *answer;
static PyObject *zero;
PyObject* stack[2];
if (zero == NULL) {
zero = PyLong_FromLong(0);
@ -490,17 +490,13 @@ keyobject_richcompare(PyObject *ko, PyObject *other, int op)
/* Call the user's comparison function and translate the 3-way
* result into true or false (or error).
*/
args = PyTuple_New(2);
if (args == NULL)
return NULL;
Py_INCREF(x);
Py_INCREF(y);
PyTuple_SET_ITEM(args, 0, x);
PyTuple_SET_ITEM(args, 1, y);
res = PyObject_Call(compare, args, NULL);
Py_DECREF(args);
if (res == NULL)
stack[0] = x;
stack[1] = y;
res = _PyObject_FastCall(compare, stack, 2, NULL);
if (res == NULL) {
return NULL;
}
answer = PyObject_RichCompare(res, zero, op);
Py_DECREF(res);
return answer;