What is the best way to reduce the RSC payload size in Next.js Server Components?

Reduce RSC payload size through selective data fetching, prop minimization, and streaming. Fetch only required fields from APIs rather than complete objects. Transform data server-side to remove unnecessary fields before passing to Client Components. Use database projections to select specific columns. Implement pagination for large datasets instead of loading everything. Stream large responses incrementally with Suspense boundaries. Avoid passing entire objects as props when components need only specific fields. Use React Server Component serialization efficiently: functions and class instances cannot be serialized. Compress responses at the edge with middleware. Enable Next.js built-in compression for production. Use Dynamic imports with ssr: false for non-critical client components. Implement code splitting to separate large dependencies. Monitor payload size in Network tab regularly. Validate JSON structure with our JSON Viewer at jsonconsole.com/json-viewer to identify optimization opportunities. The key is architectural: design components to accept minimal data, fetch on-demand, and stream progressively. Proper data flow design reduces payload more than optimization tricks.