What are the performance characteristics of std::map in C++11?

What are the performance characteristics of std::map in C++11?

In C++11, std::map is implemented as a balanced binary tree, typically a Red-Black tree. It provides logarithmic time complexity for insertions, deletions, and lookups.

How does std::map compare to std::unordered_map in terms of performance?

std::unordered_map offers average constant time complexity for lookups, insertions, and deletions, making it faster than std::map for most use cases, especially with large datasets.

Are there any scenarios where std::map is preferred over std::unordered_map?

Yes, std::map is preferred when you need ordered elements or when you require range queries, as it maintains the order of keys.

What are the memory overheads associated with std::map?

std::map has a higher memory overhead due to its tree structure, which requires additional pointers for balancing and maintaining the tree.