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[[!comment format=mdwn
username="http://joeyh.name/"
ip="24.159.78.125"
subject="interesting idea"
date="2014-07-30T15:03:46Z"
content="""
This could be done in constant space using a bloom filter of known file sizes. Files with wrong sizes would sometimes match, but no problem, it would then just do the work it does now.
However, to build such a filter, git-annex would need to do a scan of all keys it knows about. This would take approximately as long to run as `git annex unused` does. It might make sense to only build the filter if it runs into a fairly large file. Alternatively, a bloom filter of file sizes could be cached and updated on the fly as things change (but this gets pretty complex).
"""]]
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