SwiftUI Image Caching Explained - Faster Lists & Better Performance

Every network image in a list causes a network request, lag, and janky scrolling. Caching solves this.

What this video covers:

  • Why image caching matters for list performance
  • NSCache — fast in‑memory caching
  • Disk caching — persistence across launches
  • URLCache — built‑in HTTP caching
  • Combining memory + disk for a two‑level cache
  • Caching strategies: eviction, limits, and expiration
  • Measuring performance improvements

Real example: A product list with images that loads instantly on second scroll — zero flicker, zero re‑downloads.

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