Rendering 10,000 items in the DOM will crash most browsers. Blazor provides powerful tools to handle 'Big Data' in the UI.
The <Virtualize> component only renders the items that are currently visible on the screen. As the user scrolls, it dynamically swaps out the items. This allows you to display a list of millions of records with the performance of a list of ten.
Never fetch 10,000 items from the API at once. Use skip and take parameters. Your Blazor component should only request the 'Current Page' of data. Combine this with the Virtualize component's ItemsProvider to fetch chunks of data automatically as the user scrolls.
Q: "When should I use Virtualization vs Pagination?"
Architect Answer: "Use **Virtualization** for 'Infinite Scroll' style experiences (like social feeds or log viewers). Use **Pagination** for traditional enterprise data grids where the user needs to jump to specific pages or see a fixed set of results. For the best UX, provide both: Page-based navigation for structure, and virtualized rows for performance."