Rendering thousands of items in a list can severely impact application performance, causing slow rendering and sluggish scrolling. With over 10 years of experience building Angular applications and as the creator of CoreUI, I’ve optimized data-heavy admin panels and dashboards where performance is critical. From my expertise, the most effective solution is Angular CDK’s virtual scrolling, which renders only visible items and dramatically improves performance for large datasets. This method can handle lists with tens of thousands of items while maintaining smooth 60fps scrolling.