Now THAT’S What I Call Service Worker! – A List Apart

The 95th percentile of RUM data is a great place to assess the slowest experiences. In this case, we see that the streaming Service Worker confers a 40% and 51% improvement in FCP and LCP, respectively, over no Service Worker at all. Compared to the “standard” Service Worker, we see a reduction in FCP and LCP by 19% and 43%, respectively.