What are some performance tips for C++14?

What are some performance tips for C++14?

C++14 introduced several features that can help improve performance. Here are a few tips:

1. Use std::make_unique and std::make_shared for better memory management.
2. Leverage lambda expressions for cleaner and faster code.
3. Utilize constexpr for compile-time computations to reduce runtime overhead.

Can you explain how constexpr can improve performance?

Certainly! constexpr allows you to evaluate functions at compile time, which can eliminate the need for runtime calculations. This can lead to faster execution and reduced memory usage, especially in scenarios where the same calculations are performed repeatedly.

Are there any specific STL containers that are more efficient in C++14?

Yes, in C++14, std::array and std::vector are often preferred for their performance benefits. std::array has a fixed size and is allocated on the stack, making it faster for small data sets. std::vector is dynamic and can grow, but it also provides better cache locality compared to other containers.

What about multithreading improvements in C++14?

C++14 introduced features like std::shared_timed_mutex and std::unique_lock which enhance multithreading capabilities. These allow for more efficient locking mechanisms, reducing contention and improving performance in concurrent applications.