What is the memory usage of doubly linked lists?

What is the memory usage of doubly linked lists?

Doubly linked lists use more memory than singly linked lists because each node contains two pointers: one for the next node and one for the previous node.

How much memory does each node typically use?

Each node in a doubly linked list typically uses memory for the data it holds plus two pointers. If we assume each pointer is 8 bytes (on a 64-bit system), and the data is, say, an integer (4 bytes), then each node would use about 20 bytes.

Are there any advantages to using doubly linked lists despite the extra memory?

Yes, the main advantage is that you can traverse the list in both directions, which can simplify certain operations like deletion and insertion.

What are some common use cases for doubly linked lists?

Common use cases include implementing navigation systems (like browser history), undo functionality in applications, and managing playlists in media players.