Speed has always mattered, and it matters even more in mobile, where connection speed and reliability can vary wildly. A common bottleneck? Images.
How to serve up images lies squarely at the intersection of design and code, as we work to tune our sites for performance while maintaining maximum visual UI polish, especially for newer, pixel-dense displays. This presentation gives an overview of common (and less common) techniques, along with heuristics we can use to evaluate the suitability of each for differing applications.