Since I don't like to use software already on market to teach myself in new techniques I'm developing a tool looking for duplicates of files based on their hashes.
Reading the file entries from a path is not the problem but hashing the files takes it's amount of time.
Does NTFS natively support a per file checksum which I can use?
Since my lag of knowledge of NTFS internally I don't know which search terms to use. ntfs+checksum+file is widely useless.
No, there is no hashes in NTFS. File writes will become very slow if any change on e.g. 10MB file requires hash recalc.