A method for difference analysis in file sub-regions includes determining a start location in each of a first file and a second file. The start location is defined from a start indicator. The method includes determining a stop location in each of the first file and the second file. The stop location is defined from a stop indicator. The method includes defining a first difference region in the first file and a second difference region in the second file. The first and second difference regions include portions of the first and second files respectively. The portions are between the start location and the stop location in the first and second files. The method includes performing a difference analysis between the first difference region and the second difference region, including identifying differences between the first difference region of the first file and the second difference region of the second file.
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