"First Input Delay (FID) measures the time that it takes for a web page to respond to the first user interaction with the page. As of July 2018, FID is available in the Chrome UX Report as an experimental metric."

"By using a number of these design techniques, you can help the user of your apps by guiding them to where they want to be and also make your apps feel faster by reducing user anxiety."

Web fonts are awesome. They make your sans-serifs slabby, your headers special and your website look gorgeous. But fonts are a resource, and downloading resources always comes as a cost — if you don’t load web fonts efficiently, what you get instead are phantom underlines, blank pages, and user rage. Let’s talk about ways to avoid this, and what new platform features are here to help us deliver pretty (but also!) fast experiences to everyone.

Web fonts are difficult to get right. An often overlooked and disruptive piece of web performance, web fonts can slow down your site and leave your visitors confused and agitated. No one wants agitated visitors. In this talk we’ll discuss useful methods to render web fonts quickly and without disruption so that visitors can do what should be a simple task—read the text. After all, web fonts are not rocket science.

"When someone has a negative experience on mobile, they’re much less likely to purchase from you in the future. So if you want to stay ahead of the curve, you need to prioritize speed within your organization."