Addy O. Image Optimization 2021

Textbook in PDF format

Images have always been a key part of the web. Our brains are able to interpret images much faster than text, which is why high-quality visuals drive conversions and user engagement.
That said, loading images efficiently at scale isn’t a little project for a quiet afternoon. It requires understanding of compression techniques, loading behavior, image decoding and image CDNs, adaptive media loading and caching.
This book will equip you with everything you need to know to optimize how you compress, serve and maintain images — boosting performance along the way