What are some performance tips for the C++ standard library?

What are some performance tips for the C++ standard library?

To improve performance with the C++ standard library, consider using algorithms from <algorithm> efficiently and prefer std::vector over std::list for better cache performance.

Can you explain why std::vector is preferred over std::list?

std::vector provides contiguous memory storage, which enhances cache locality and reduces overhead compared to std::list, which uses non-contiguous nodes.

What about using std::unordered_map instead of std::map?

std::unordered_map offers average constant time complexity for lookups, insertions, and deletions, making it faster than std::map, which is logarithmic.

Are there any specific algorithms I should avoid?

Avoid using algorithms that require excessive copying or unnecessary allocations, such as std::copy on large containers without move semantics.