4Using Events, Listeners, Timers, and Callbacks in Node.js
Node.js provides scalability and performance through its powerful event-driven model. This chapter focuses on understanding the model and how it differs from traditional threading models used by most webservers. Understanding the event model is critical because it may force you to change the design thinking for your applications. However, the changes will be well worth the improvement in speed that you get using Node.js.
This chapter also covers the different methods you use to add work to the Node.js event queue. You can add work using event listeners or timers, or you can schedule work directly. You also learn how to implement events in your own custom modules and objects.