diff --git a/arrays_and_strings/hash_map_array.py b/arrays_and_strings/hash_map_array.py
index 533065f..343e4e2 100644
--- a/arrays_and_strings/hash_map_array.py
+++ b/arrays_and_strings/hash_map_array.py
@@ -41,4 +41,7 @@ class Bucket:
     def remove(self, key):
         for i, k in enumerate(self.bucket):
             if key == k[0]:
+                # del is an O(n) operation, as we would copy all the i: elements
+                # to make it O(1) we could swap the element we want to remove
+                # with the last element in the bucket
                 del self.bucket[i]