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Replace PyObject_CallFunctionObjArgs() with fastcall

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* PyObject_CallFunctionObjArgs(func, NULL) => _PyObject_CallNoArg(func)
* PyObject_CallFunctionObjArgs(func, arg, NULL) => _PyObject_CallArg1(func, arg)

PyObject_CallFunctionObjArgs() allocates 40 bytes on the C stack and requires
extra work to "parse" C arguments to build a C array of PyObject*.

_PyObject_CallNoArg() and _PyObject_CallArg1() are simpler and don't allocate
memory on the C stack.

This change is part of the fastcall project. The change on listsort() is
related to the issue #23507.
This commit is contained in:
Victor Stinner 2016-12-01 14:43:22 +01:00
parent 8be1c39eb3
commit 27580c1fb5
33 changed files with 71 additions and 83 deletions
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6
Python/ceval.c
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@ -1756,7 +1756,7 @@ _PyEval_EvalFrameDefault(PyFrameObject *f, int throwflag)
Py_DECREF(value);
goto error;
}
res = PyObject_CallFunctionObjArgs(hook, value, NULL);
res = _PyObject_CallArg1(hook, value);
Py_DECREF(value);
if (res == NULL)
goto error;
@ -3062,7 +3062,7 @@ _PyEval_EvalFrameDefault(PyFrameObject *f, int throwflag)
Py_DECREF(mgr);
if (enter == NULL)
goto error;
res = PyObject_CallFunctionObjArgs(enter, NULL);
res = _PyObject_CallNoArg(enter);
Py_DECREF(enter);
if (res == NULL)
goto error;
@ -3096,7 +3096,7 @@ _PyEval_EvalFrameDefault(PyFrameObject *f, int throwflag)
}
SET_TOP(exit);
Py_DECREF(mgr);
res = PyObject_CallFunctionObjArgs(enter, NULL);
res = _PyObject_CallNoArg(enter);
Py_DECREF(enter);
if (res == NULL)
goto error;