Why is the React Compiler superior to manual memoization patterns?

Manual memoization requires developers to guess dependency arrays and stability, leading to stale closures, missed optimizations, or over-memoization bloat, while React Compiler statically analyzes actual render paths to inject precise memoization. It understands React patterns deeply detecting pure computations, stable callbacks, and impossible branches automatically eliminating dead code paths that manual approaches miss. Production apps see consistent 30% render reduction without the maintenance burden of scattered optimization hooks.