Yoav Weiss has been working on mobile web performance for longer than he cares to admit, on the server side as well as in browsers. He now works as part of Google Chrome developer relations team, helping to fix web performance once and for all.
He takes image bloat on the web as a personal insult, which is why he joined the Responsive Images Community Group and implemented the various responsive images features in Blink and WebKit. That was his gateway drug into the wonderfully complex world of browsers and standards.
When he’s not writing code, he’s probably slapping his bass, mowing the lawn in the French countryside, or playing board games with his family.
What is that preload? What does it do? And how can it help you? Preload gives developers the ability to define custom loading logic without suffering the performance penalty that script-based resource loaders incur. In human terms, it’s a way to tell a browser to start fetching a certain resource, because you as authors know that the browser is going to need that particular resource pretty soon.
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The dream of a “magical” image format that will solve the responsive images problem lives on. Yoav Weiss started wondering if such an image format could be used to solve both the art direction and resolution-switching use cases. So he created a prototype to prove its feasibility. The prototype is now available, ready to be tinkered with. In this post, Yoav explains what this prototype does, what it cannot do, how it works, and its advantages and disadvantages relative to markup solutions.
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From time to time, when a discussion is taking place about ways to implement responsive images, someone comes along and says, “Hey, guys! What we really need is a media query that enables us to send high-resolution images to people on a fast connection and low-resolution images to people on a slow connection.” At least early on, a lot of people agreed.
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