diff --git a/code_to_optimize/bubble_sort_3.py b/code_to_optimize/bubble_sort_3.py
index db7db5f92..7093dfbf0 100644
--- a/code_to_optimize/bubble_sort_3.py
+++ b/code_to_optimize/bubble_sort_3.py
@@ -1,8 +1,11 @@
 def sorter(arr):
-    for i in range(len(arr)):
-        for j in range(len(arr) - 1):
+    n = len(arr)
+    for i in range(n):
+        swapped = False
+        for j in range(n - i - 1):
             if arr[j] > arr[j + 1]:
-                temp = arr[j]
-                arr[j] = arr[j + 1]
-                arr[j + 1] = temp
+                arr[j], arr[j + 1] = arr[j + 1], arr[j]
+                swapped = True
+        if not swapped:
+            break
     return arr