In the next chapter, and indeed for the rest of the book, we’re going to build upon this simple, robust server infrastructure we’ve built, as we continue to put the “modern” in “modern systems programming.” By adding an asynchronous HTTP client, tightly integrated with the server, you’ll gain the ability to interact with the outside world in a general, powerful way. And by adding support for asynchronous router and handler functions in our framework, you’ll do all of this while preserving the striking performance characteristics we just examined.