What are some performance tips for using STL vectors in C++?

What are some performance tips for using STL vectors in C++?

To optimize STL vectors in C++, consider reserving space with vector::reserve() to avoid multiple reallocations.

How does reserving space improve performance?

Reserving space reduces the number of memory allocations and copies, which can significantly enhance performance, especially in large vectors.

Are there any other tips for managing memory with vectors?

Yes, you can use shrink_to_fit() to reduce the capacity of a vector to fit its size, freeing unused memory.

What about iterating over vectors? Any best practices?

Use range-based for loops or iterators for better performance and readability when iterating over vectors.