Throughout the course of this book, we've explored some of the essentials of responsive web design, using HTML5 and CSS3, and learned how to begin to modify our code to make content responsive across different devices.
We should keep in mind that building just a responsive website is not enough—we must also test and optimize content to work as efficiently as possible across different devices. If pages on our site are slow to load, then this will clearly be a concern. Throughout the course of this chapter, we will look at some of the tips and tricks we can use to begin to ensure that our sites are sufficiently responsive and content loads quickly.
In this chapter, we will cover the following topics:
Exploring why pages load slowly
Optimizing the performance of our sites
Measuring site performance
Testing for cross-browser compatibility
Exploring best practices
Curious? Let's get started!