Hoist constant expression out of an inner loop
diff --git a/Modules/_collectionsmodule.c b/Modules/_collectionsmodule.c
index 087f8e5..dbe44e1 100644
--- a/Modules/_collectionsmodule.c
+++ b/Modules/_collectionsmodule.c
@@ -371,6 +371,7 @@
deque_extend(dequeobject *deque, PyObject *iterable)
{
PyObject *it, *item;
+ int trim = (deque->maxlen != -1);
/* Handle case where id(deque) == id(iterable) */
if ((PyObject *)deque == iterable) {
@@ -417,7 +418,8 @@
Py_SIZE(deque)++;
deque->rightindex++;
deque->rightblock->data[deque->rightindex] = item;
- deque_trim_left(deque);
+ if (trim)
+ deque_trim_left(deque);
}
if (PyErr_Occurred()) {
Py_DECREF(it);
@@ -434,6 +436,7 @@
deque_extendleft(dequeobject *deque, PyObject *iterable)
{
PyObject *it, *item;
+ int trim = (deque->maxlen != -1);
/* Handle case where id(deque) == id(iterable) */
if ((PyObject *)deque == iterable) {
@@ -480,7 +483,8 @@
Py_SIZE(deque)++;
deque->leftindex--;
deque->leftblock->data[deque->leftindex] = item;
- deque_trim_right(deque);
+ if (trim)
+ deque_trim_right(deque);
}
if (PyErr_Occurred()) {
Py_DECREF(it);