When we think about web performance, it’s easy to fall into an abyss of metrics: TCP connection, TTFB, start render, PageSpeed and YSlow scores. These metrics are all useful and necessary, but they’re just a means to an end: trying to understand when our users are happy. 

This keynote at Velocity 2017 walks through a brief history of UX and web performance research, highlighting key studies that connect the dots between performance and user experience and sharing some educated guesses about new metrics that are just around the corner.

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