What are the performance implications of C++11 features?

What are the performance implications of using C++11 features?

C++11 introduced several features like smart pointers, lambda expressions, and concurrency support. These can improve performance by optimizing memory management and enabling parallel processing.

Can you explain how smart pointers affect performance?

Smart pointers, like std::unique_ptr and std::shared_ptr, help manage memory automatically, reducing the risk of memory leaks. They can also improve performance by eliminating the overhead of manual memory management.

What about lambda expressions? Do they have any performance costs?

Lambda expressions can introduce some overhead, especially if they capture variables. However, they often lead to more efficient code by enabling in-place function definitions and reducing the need for function objects.

How does C++11's concurrency support impact performance?

C++11's concurrency features, like std::thread and std::async, allow for better utilization of multi-core processors, which can significantly enhance performance for parallelizable tasks.