usage: ediff [-d] file1 file2
-d write edit distance
This is a functioning micro diff tool using an [O(NP) algorithm][Wu+89], compared to the older [O(ND) difference algorithm][Mye86] used by some versions of diff. Its output is based on the default diff(1) output described by POSIX and [The Open Group Base Specifications][SUSV7]. The output is suitable for use with patch(1).
The -d option simply writes the edit distance between file1 and file2.
Wu, Manber, Myers, and Miller; August 1989;
"An O(NP) Sequence Comparison Algorithm";
Fowler, Noll, Vo; 1994
Fowler, Noll, Vo on Wikipedia
"diff", The Open Group Base Specifications Issue 7
IEEE Std 1003.1, 2013 Edition
Eugene W. Myers; "An O(ND) Difference Algorithm and Its Variations";
Algorithmica, 1986, pages. 251-266
Webb Miller and Eugene W. Myers; "A File Comparison Program";
Software-Practice And Experience, Vol. 15(11). 1025-1040 (November 1985)
D.S. Hirschberg, "A linear space algorithm for computing maximal common subsequence problem";
Comm. of ACM, Vol. 18, June 1975, pages 341-343
Which hashing algorithm is best for uniqueness and speed?
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