Discover strategies for creating high-performance web UIs using Web Components in this conference talk from the Reliable Web Summit 2021. Explore techniques to measure and optimize Web Components, including tree shaking for components, icons, and CSS, bundling strategies with Webpack and Rollup, CDN support for micro-frontends, and tracking performance regressions through CI automation and Lighthouse. Gain insights into building lightweight and consistent UIs for any web application, covering topics such as component-level tree shaking, side effects, icon optimization, CSS performance improvements, browser rendering techniques, and automated performance benchmarking. Learn how to leverage Web Components to enhance your web development skills and create more efficient, scalable user interfaces.