Image downloader and cache (request coalescing)
In a coding interview you're asked to build, in 30 minutes, an ImageManager that fetches an image by URL and returns it from cache if it's been fetched before. How would you handle several cells requesting the same URL at the same time?
ConcurrencyShort answerAdvanced
In a message list screen, each cell downloads its profile image asynchronously and caches…
#nscache #actor
CS fundamentals and algorithmsShort answerAdvanced
You need to write an in-memory image cache with LRU eviction yourself. Which data structu…
#image-cache #nscache
PersistenceShort answerBasics
NSCache exists, so why do image libraries write their own LRU cache?
#image-cache #nscache
iOS system designShort answerAdvanced
If you had to build an image loading library like SDWebImage or Kingfisher yourself, how …
#image-cache #cancellation