When should I use std::deque in C++?

What is std::deque in C++ and when should I use it?

std::deque is a double-ended queue that allows fast insertion and deletion at both ends. Use it when you need efficient access to both ends.

How does std::deque compare to std::vector?

std::vector is better for random access and has lower memory overhead, while std::deque is better for frequent insertions/deletions at both ends.

Can you give me an example of when to prefer std::deque over std::vector?

Sure! If you're implementing a task scheduler where you frequently add and remove tasks from both ends, std::deque is ideal.

Are there any performance considerations I should be aware of?

Yes, std::deque may have slightly higher overhead due to its internal structure, so for large datasets with mostly random access, std::vector might be better.