One of the challenges with patch analysis is diffing big files. The definition of big files can vary, but usually we are talking about files that are bigger than a few mega-bytes. Usually Windows system32 files are relatively small.
read more.....https://mattoh.wordpress.com/2014/05/05/big-file-diffing-with-darungrim/
read more.....https://mattoh.wordpress.com/2014/05/05/big-file-diffing-with-darungrim/