Added separate free list for instance method objects, for a few

percent speed up.  Also add PyMethod_Fini() to discard it.

diff --git a/Objects/classobject.c b/Objects/classobject.c
index 749a06a0eb238fa4ab8d2dc8281c40749c193853..f0f023b96765e1e99a8d28cca2bf1219d9b96cda 100644 (file)
--- a/Objects/classobject.c
+++ b/Objects/classobject.c
@@ -1213,6 +1213,9 @@ typedef struct {
        PyObject *im_class;     /* The class that defined the method */
 } PyMethodObject;
 
+
+static PyMethodObject *free_list;
+
 PyObject *
 PyMethod_New(func, self, class)
        PyObject *func;
@@ -1224,9 +1227,17 @@ PyMethod_New(func, self, class)
                PyErr_BadInternalCall();
                return NULL;
        }
-       im = PyObject_NEW(PyMethodObject, &PyMethod_Type);
-       if (im == NULL)
-               return NULL;
+       im = free_list;
+       if (im != NULL) {
+               free_list = (PyMethodObject *)(im->im_self);
+               im->ob_type = &PyMethod_Type;
+               _Py_NewReference(im);
+       }
+       else {
+               im = PyObject_NEW(PyMethodObject, &PyMethod_Type);
+               if (im == NULL)
+                       return NULL;
+       }
        Py_INCREF(func);
        im->im_func = func;
        Py_XINCREF(self);
@@ -1315,7 +1326,8 @@ instancemethod_dealloc(im)
        Py_DECREF(im->im_func);
        Py_XDECREF(im->im_self);
        Py_DECREF(im->im_class);
-       free((ANY *)im);
+       im->im_self = (PyObject *)free_list;
+       free_list = im;
 }
 
 static int
@@ -1399,3 +1411,15 @@ PyTypeObject PyMethod_Type = {
        (getattrofunc)instancemethod_getattr, /*tp_getattro*/
        0,                      /*tp_setattro*/
 };
+
+/* Clear out the free list */
+
+void
+PyMethod_Fini()
+{
+       while (free_list) {
+               PyMethodObject *v = free_list;
+               free_list = (PyMethodObject *)(v->im_self);
+               PyMem_DEL(v);
+       }
+}