# Vercel Authors - Performance – SWR (Highlights) ![rw-book-cover|256](https://readwise-assets.s3.amazonaws.com/static/images/article1.be68295a7e40.png) ## Metadata **Cover**:: https://readwise-assets.s3.amazonaws.com/static/images/article1.be68295a7e40.png **Source**:: #from/readwise **Zettel**:: #zettel/fleeting **Status**:: #x **Authors**:: [[Vercel Authors]] **Full Title**:: Performance – SWR **Category**:: #articles #readwise/articles **Category Icon**:: 📰 **URL**:: [swr.vercel.app](https://swr.vercel.app/docs/advanced/performance) **Host**:: [[swr.vercel.app]] **Highlighted**:: [[2022-04-20]] **Created**:: [[2022-09-26]] ## Highlights - SWR only updates the states that are used by the component, which is only data now. If you are not always using all these 3 states, you are already benefitting from this feature.