The Performance Wall: Why React Isn't a Data Buffer If you’ve ever built a real-time application—a trading dashboard, a crypto ticker, or a live sensor monitor—you’ve likely hit the "React Performance Wall." You pipe your WebSocket messages directly into useState , and suddenly, your browser becomes a stuttering, unresponsive mess. The culprit is simple but often misunderstood: React is a UI library, not a data buffer. When you treat React state as the ultimate source of truth for e...