"The Server Timing header provides a discrete and convenient way to communicate backend server performance timings to developer tools in the browser. Adding timing information to your application enables you to monitor back-end and front-end performance all in one place."

"This extensive review shows how little we really know about performance perception and how inadequate the metrics currently used as industry standards probably are"

"we have set up a transversal performance monitoring system that provides the basis for actions and a direct assessment of their impact. We no longer address web performance optimization as a problem but rather as a continuous improvement initiative and it perfectly fits with our culture of innovation and excellence."

Preload Best Practice: Only use preload="auto" if there is a high probability that the video will be watched. In general, the use of preload="metadata" provides a good balance in data usage vs. startup time, but should be monitored for excessive data usage.

Measuring Web Performance for Wikipedia using synthetic testing tools

"If you’re building a web experience and want to stay fast, a performance budget can be critical. For success, embrace performance budgets and learn to live within them. Network & CPU limits on mobile can require asking hard questions like, “what is really important to my users?”"

Altitude NYC 2018: Making Pinterest Fast | Sarah Dapul-Weberman, Michelle Vu, Pinterest