What are the best practices for using std::map in C++11?

What are the best practices for using std::map in C++11?

When using std::map in C++11, consider using emplace() for efficiency, and prefer const references for keys.

Can you explain why emplace() is more efficient?

Emplace() constructs elements in place, avoiding unnecessary copies, which can improve performance.

Are there any specific scenarios where std::map is preferred over other containers?

Yes, std::map is ideal for sorted key-value pairs and when you need fast lookups, insertions, and deletions.

What about memory usage? Is std::map memory efficient?

std::map uses more memory than some other containers due to its tree structure, but it provides efficient operations.