# Jason Carver - Intro to Beam Sync (Highlights) ![rw-book-cover|256](https://readwise-assets.s3.amazonaws.com/static/images/article3.5c705a01b476.png) ## Highlights - Beam Sync *starts* by executing the launch block, and only requests state data that is missing from the local database. Lazy download - we run another process in the background which fills these gaps.