What are some performance tips for C++17?

What are some performance tips for C++17?

Here are a few tips to improve performance in C++17:

1. Use std::optional for better memory management.
2. Leverage std::variant for type-safe unions.
3. Utilize std::string_view to avoid unnecessary copies.
4. Optimize your use of constexpr for compile-time calculations.

Can you explain how std::string_view helps with performance?

Certainly! std::string_view is a lightweight, non-owning reference to a string. It allows you to pass strings around without copying them, which can significantly reduce overhead, especially in performance-critical applications.

What about using constexpr? How does it improve performance?

Using constexpr allows you to perform computations at compile time rather than at runtime. This can lead to faster execution since the results are precomputed, reducing the workload during program execution.

Are there any specific algorithms that benefit from C++17 features?

Yes, algorithms that can leverage std::optional and std::variant for better error handling and type safety can see performance improvements. Additionally, using std::any can help manage different types without sacrificing performance.