FastImage is an Objective-C port of the Ruby project by Stephen Sykes. It's directive is to request as little data as possible (usually just the first batch of bytes returned by a request) to determine the size and type of a remote image.
This means you can get the size of a large image (say 2MB), by only downloading around 8KB - 32KB
FastImage alternatives and similar libraries
Based on the "Image" category
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