regressing the performance bugfix -- Guido wants the performance bug left
alone, because there can be no guarantee re the semantics of += vs + .
diff --git a/Misc/NEWS b/Misc/NEWS
index f47113c..74096c0 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -47,9 +47,6 @@
- obj.__contains__() now returns True/False instead of 1/0. SF patch
820195.
-- builtin_sum() now uses PyNumber_InPlaceAdd, fixing a previous
- performance bug for sum(list_of_lists) and similar cases.
-
Extension modules
-----------------
diff --git a/Python/bltinmodule.c b/Python/bltinmodule.c
index 718b603..0309f1de 100644
--- a/Python/bltinmodule.c
+++ b/Python/bltinmodule.c
@@ -1840,7 +1840,7 @@
}
break;
}
- temp = PyNumber_InPlaceAdd(result, item);
+ temp = PyNumber_Add(result, item);
Py_DECREF(result);
Py_DECREF(item);
result = temp;