rs/SDWebImage — pull request #434 by jparise (2013-06-26 02:28:12+00:00)
Title: Add -calculateSizeWithCompletionBlock:.

This method provides a way to asynchronously calculate the size of the
disk cache, reporting both the number of files and the total file
size.

This is useful when querying large disk caches because the file system
enumeration operation can take some time.