Paint Holding - reducing the flash of white on same-origin navigations | Web | Google Developers
This is an excellent UX improvement in Chrome. For sites like The Session, where page loads are blazingly fast, this really makes them feel like single page apps.
Our goal with this work was for navigations in Chrome between two pages that are of the same origin to be seamless and thus deliver a fast default navigation experience with no flashes of white/solid-color background between old and new content.
This is exactly the kind of area where browsers can innovate and compete on the UX of the browser itself, rather than trying to compete on proprietary additions to what’s being rendered.