We have two caches that are used to cache images. The AssetCache and the ImageCache. The ImageCache key is (asset id, size), so we are storing one copy of the image for each size that we have computed.

This can get kind of zany when dragging to resize the window with an image in the Markdown viewer. This will compute many, many sizes of the image and store in the ImageCache.

There is still only one copy in the AssetCache, though, and images are only ever removed from either cache when the size of the AssetCache is over 320MB. Resizing does not affect this size, so the ImageCache tends to fill unbounded.

Linear: APP-3877