51CTO HarmonyOS Developer Community

Sep 23, 2026 · Mobile Development

Eliminate HarmonyOS Scroll White Blocks: Dynamic Prefetch + ImageKnife Caching

This article presents a complete HarmonyOS solution for eliminating white blocks during fast scrolling in image-heavy lists by combining dynamic prefetching via the prefetcher library with ImageKnife image caching, demonstrating two implementations using LazyForEach and Repeat components with performance benchmarks showing under 5% white block rate and minimal memory overhead.