What is the performance of iterators in C++ std::deque?

Can you explain the performance characteristics of iterators in C++ std::deque?

Sure! The performance of iterators in C++ std::deque is generally efficient, but it can vary depending on the operation.

What kind of operations are we talking about?

For example, accessing elements via iterators is constant time, but inserting or deleting elements can be linear time due to potential reallocations.

How does this compare to std::vector?

In std::vector, iterators also provide constant time access, but insertions and deletions can be more efficient than in std::deque, especially at the end.

Are there any scenarios where std::deque is preferred over std::vector?

Yes, std::deque is preferred when you need efficient insertions and deletions at both ends of the container.