Jeremy is a contributor to WebFundamentals
When we measure loading performance, we often do so using testing tools that only describe performance from the perspective of the tester. If we want to measure loading performance from the user's perspective, we must rely on the Navigation and Resource Timing APIs.
Everyone loves animated GIFs. The only problem is that they can be massive, often weighing in at several megabytes. In this guide, you'll learn how to curb the bloat caused by animated GIFs by replacing them with MPEG-4 and WebM video sources!
If your site has a ton of images and video, but you don't want to cut down on any of it, lazy loading might be just the technique you need to improve initial page load time and lower per-page payload.
Thanks to mobile device and network proliferation, more people are using the web than ever before. As this user base grows, performance is more important than ever. In this article, find out why performance matters, and learn what you can do to make the web faster for everyone.