How do std::string and std::string_view compare in C++17 performance?

How do std::string and std::string_view compare in terms of performance in C++17?

In C++17, std::string_view is generally more efficient than std::string for read-only operations because it avoids unnecessary copies.

Can you explain why std::string_view is faster?

Sure! std::string_view is a lightweight, non-owning reference to a string, which means it doesn't allocate memory or copy data.

Are there any downsides to using std::string_view?

Yes, since std::string_view does not own the data, it can lead to dangling references if the original string is destroyed.

When should I prefer std::string over std::string_view?

You should prefer std::string when you need to modify the string or when you need ownership of the data.