What is Web performance? Definition and explanations
Web performance measures a site's perceived speed and stability from the user's point of view, not the server's. It covers the time for the main content to appear, responsiveness to interactions and the absence of layout jumps. It is assessed on field data from real visitors rather than on a single lab test.
In one sentence
Web performance measures a site's perceived speed and stability, from the user's point of view.
We have a full page on this subject, with the detail, the use cases and how we approach it.
Web performance