For years, the internet has struggled to evaluate a user’s experience. Is it DNS response time? Total time to first byte? Number of pinwheel revolutions? With Web Vitals, developers now have a shared terminology —LCP, FCP, CLS — to improve both code and collaboration.
Data from test environments can only go so far. For complete visibility, you need data that represents real user experience — data that only Performance can give you. It’s the only way to get visibility into real-life device and network conditions such as network speed, browser, device, and region.
When you instrument Performance with Web Vitals, you turn what was once a hunch into hard data. By visualizing those transactions specific to a user’s environment, device, and network speed, you can now see the actions that are slowing a user’s experience down. And with Performance’s dedicated Web Vital histograms, you can evaluate important frontend transactions against specific thresholds.