Faster defaultlist

Author: cdgriffith

README.rst

@@ -44,7 +44,6 @@ additional functionality.
 CI tests run on:
 
 * Python 3.6+
-* Pypy
 
 Examples are provided below, and the API documentation can always be found at
 readthedocs.org_.

reusables/default_list.py

@@ -11,6 +11,5 @@ def __init__(self, *args, factory=lambda: None, **kwargs):
 
     def __getitem__(self, index):
         if index >= len(self):
-            for i in range(index - len(self) + 1):
-                self.append(self.factory())
+            self.extend(self.factory() for _ in range(index - len(self) + 1))
         return super().__getitem__(index)