Wikimedia Performance Team/Perceived Performance

The field of web performance tends to assume that faster is always better, and has produced many guidelines over the years like RAIL that promote the existence of absolute universal values for what feels instantaneous, fast or slow. Over the years, many academic studies have looked into the subject of performance perception, and we attempt here to provide a meaningful literature review for this body of work, to shed some light on what is known, common myths and what is yet to be studied.