What are the differences between std::list and std::deque in C++11?

What are the differences between std::list and std::deque in C++11?

In C++11, std::list is a doubly linked list, while std::deque is a double-ended queue. std::list allows for efficient insertions and deletions at any position, but accessing elements is slower. std::deque, on the other hand, allows fast insertions and deletions at both ends and provides faster random access compared to std::list.

When should I use std::list over std::deque?

You should use std::list when you need frequent insertions and deletions in the middle of the container and don't require random access. It's ideal for scenarios where maintaining order is crucial.

Are there any performance considerations I should be aware of?

Yes, std::list has a higher memory overhead due to its node-based structure, while std::deque has better cache performance due to its contiguous memory allocation. If you need to access elements frequently, std::deque is generally more efficient.

Can you give me an example of when to use each?

Sure! Use std::list for implementing a playlist where you frequently add or remove songs. Use std::deque for a task queue where you need to add and remove tasks from both ends efficiently.