What are some performance tips for C++11?

What are some performance tips for C++11?

Here are a few tips to improve performance in C++11:

1. Use move semantics to avoid unnecessary copies.
2. Utilize smart pointers for better memory management.
3. Prefer std::array and std::vector over raw arrays for better performance and safety.
4. Use constexpr for compile-time computations.

Can you explain move semantics?

Move semantics allow resources to be transferred from one object to another without copying. This is done using rvalue references, which enable the efficient transfer of ownership.

What are smart pointers?

Smart pointers are wrapper classes that manage the lifetime of dynamically allocated objects. They help prevent memory leaks and dangling pointers. Common types include std::unique_ptr, std::shared_ptr, and std::weak_ptr.

How does constexpr improve performance?

constexpr allows functions and variables to be evaluated at compile time, reducing runtime overhead and enabling optimizations.