Your AI Stream is Fast, but Your UI is Lagging. Here’s Why.

We’ve all seen it. You’re building a sleek AI-chat interface or a real-time agent dashboard. The tokens are flying in from the server at light speed, but the moment you try to scroll or click a "Stop" button, the tab feels like it's stuck in mud. Most devs look at their React code or their Tailwind classes. They’re looking in the wrong place. The problem isn't your UI library. The problem is that you’re Microtask-smothering your browser. The 2026 Conundrum: The "Infinite" VIP Line In the "classi