What performance optimization technique should be used when handling frequent DOM updates?
Virtual scrolling (also known as windowing) is a crucial performance optimization technique for handling frequent DOM updates, especially with large lists or tables. It works by: 1) Only rendering elements currently visible in the viewport plus a small buffer, 2) Recycling DOM elements as the user scrolls, 3) Significantly reducing the number of active DOM elements, 4) Minimizing memory usage and rendering costs. This technique is particularly important for maintaining smooth performance with large datasets, as rendering thousands of DOM elements can severely impact performance.