What is dns-prefetch used for on WWW pages and when will preconnect come in handy?

The article discusses the techniques of DNS prefetching and preconnecting that can enhance the loading performance of websites. DNS prefetching is the process of resolving domain names in advance before they are utilized, reducing the waiting time for the user to establish a connection. On the other hand, preconnecting involves establishing a connection to a server before a user actually clicks a link, allowing resources to be downloaded faster. The author provides specific examples of how both techniques can be applied and highlights the benefits they can bring to high-traffic sites. Moreover, it emphasizes the importance of using these techniques in conjunction with proper website design to achieve optimal results.