Express is a web application framework built upon Connect (a middleware framework). This means that the focus of Express is on constructing an application that includes providing a template system, whereas the focus of Connect is on web server infrastructural support.
The home page for Connect is http://senchalabs.github.com/connect/.
The home page for Express is http://expressjs.com/.
Shortly, we'll be implementing a simple application to calculate Fibonacci numbers using Express, and in later chapters we'll be doing quite a bit more with Express. We'll also be exploring how to mitigate the performance problems from the computationally intensive code we discussed earlier.
Before we start implementing the Fibonacci application, ...