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From the Blog

Are React Server Components Improving Your Apps?

React Server Components (RSCs) were touted as a way to make apps faster by doing more work on the server and sending less JavaScript to the browser. In practice, there are real cases of performance wins. For example, one company rebuilt a Next.js site with RSC and saw a 62% reduction in JS bundle size and a 63% improvement in Google’s Speed Index (meaning content became visible much faster). This happened even though the total HTML sent was larger; the key was that the RSC version sent almost no client-side React logic for those parts, so the browser had much less work to do and achieved first paint sooner. Similarly, the RedwoodJS framework found that by removing GraphQL and using RSC for data fetching, they avoid a whole class of network overhead (no more N+1 GraphQL requests or extra round trips) and eliminate that performance penalty. In short, RSCs can dramatically cut what the client must download and execute, which translates into faster loading in many scenarios.