FastImageCache

Uses mmap to map image tables directly into memory, eliminating buffer copies and reducing real memory usage, as explained in the README's mapped memory section.

Stores images as uncompressed bitmaps, so expensive JPEG decompression happens only once per image, ensuring fast retrieval for repeated displays.

Ensures proper byte alignment for images, preventing Core Animation from creating unnecessary copies and maintaining 60FPS scrolling, crucial for smooth UI.

Manages cache expiry based on recency and replaces least-recently-used images when full, simplifying cache maintenance.