Sweet, smooth UI effects for your app! Not so easy! Let’s talk about jank, and how to avoid it. We’ll talk about some of the improvements we’ve made to the CSS animation implementation in Chrome so you can make stuff wiggle without hitching, and some common performance pitfalls to avoid. Most importantly, we’ll demonstrate how to find these pitfalls with Chrome’s tools so you can investigate performance problems on your own in the future -- there’s no magic bullet for rendering performance.