diff options
Diffstat (limited to 'Objects/classobject.c')
| -rw-r--r-- | Objects/classobject.c | 23 |
1 files changed, 18 insertions, 5 deletions
diff --git a/Objects/classobject.c b/Objects/classobject.c index 9f364e2e88..a9e8c6a9ea 100644 --- a/Objects/classobject.c +++ b/Objects/classobject.c @@ -4,10 +4,16 @@ #include "Python.h" #include "structmember.h" +/* Free list for method objects to safe malloc/free overhead + * The im_self element is used to chain the elements. + */ +static PyMethodObject *free_list; +static int numfree = 0; +#define MAXFREELIST 256 + #define TP_DESCR_GET(t) \ (PyType_HasFeature(t, Py_TPFLAGS_HAVE_CLASS) ? (t)->tp_descr_get : NULL) - /* Forward */ static PyObject *class_lookup(PyClassObject *, PyObject *, PyClassObject **); @@ -2193,8 +2199,6 @@ PyTypeObject PyInstance_Type = { In case (b), im_self is NULL */ -static PyMethodObject *free_list; - PyObject * PyMethod_New(PyObject *func, PyObject *self, PyObject *klass) { @@ -2207,6 +2211,7 @@ PyMethod_New(PyObject *func, PyObject *self, PyObject *klass) if (im != NULL) { free_list = (PyMethodObject *)(im->im_self); PyObject_INIT(im, &PyMethod_Type); + numfree--; } else { im = PyObject_GC_New(PyMethodObject, &PyMethod_Type); @@ -2332,8 +2337,14 @@ instancemethod_dealloc(register PyMethodObject *im) Py_DECREF(im->im_func); Py_XDECREF(im->im_self); Py_XDECREF(im->im_class); - im->im_self = (PyObject *)free_list; - free_list = im; + if (numfree < MAXFREELIST) { + im->im_self = (PyObject *)free_list; + free_list = im; + numfree++; + } + else { + PyObject_GC_Del(im); + } } static int @@ -2620,5 +2631,7 @@ PyMethod_Fini(void) PyMethodObject *im = free_list; free_list = (PyMethodObject *)(im->im_self); PyObject_GC_Del(im); + numfree--; } + assert(numfree == 0); } |