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Image Performance


To solve the most critical performance problems with the biggest impact, start with images. Responsive Issues Community Group (RICG) chair Mat Marquis helps us make smart decisions about images and shows us the swiftest way to improve a website’s performance: from understanding compression methods used by common image formats, to responsive image markup patterns and their usage, to handling content delivery for the best user experience. Get up to speed—and speed up your site.

What Are Briefs?

Briefs are eBook-only guides to essential fundamentals, of-the-moment techniques, or deep nerdery on a single aspect of a topic. Whatever the book, you’re only a quick break away from learning vital, practical know-how.

What People Are Saying

Mat explains technical concepts in a very human-friendly way, with an emphasis on users and user experience. While this book is brief, Mat guides you through everything you need to know to feel confident working with responsive images. You’ll hone your skills and create a more inclusive, performant web.
Sara Soueidan, Front-end Developer
Image Performance is an entertaining, practical introduction to the finer details of image compression and performance online. The topic isn’t simple, but after reading this book, you could be forgiven for thinking it is—Mat’s just that good at explaining it.
Tim Kadlec, Web Performance Consultant
When working with images on a website, your job is akin to that of a sommelier’s. Crafting the final product, like pairing wine with food, requires both technical skill and artistic subjectivity. Get it right and the website looks and works great; get it wrong, and the whole experience suffers. Mat will help you get it right.
Chris Coyier, Cofounder of CodePen

About the Author

Mat “Wilto” Marquis is an amateur boxer, aspiring chef, halfway decent carpenter, and passable antique British motorcycle mechanic—when not making fast, accessible, responsive websites. He keeps busy.

As chair of the Responsive Issues Community Group, Mat spearheaded the effort to bring native responsive image solutions to the HTML5 specification, later going on to facilitate browser implementations and oversee the addition of native responsive image techniques to major CMSes. He has spoken at An Event Apart, edited for A List Apart, and published books with A Book Apart, completing what he describes as “like an EGOT, but for putting semicolons in the right places.”

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Original Publication Date:
September 18, 2018