Chapter 1. Understanding web performance
Chapter 2. Using assessment tools
Chapter 4. Understanding critical CSS
Chapter 5. Making images responsive
Chapter 6. Going further with images
Chapter 8. Keeping JavaScript lean and fast
Chapter 9. Boosting performance with service workers
Chapter 10. Fine-tuning asset delivery
Chapter 11. Looking to the future with HTTP/2
Chapter 12. Automating optimization with gulp
Appendix B. Native equivalents of common jQuery functionality