v 2.0 - approx. 9x faster than v. 1.0

Version 1.0 was a brute-force version that ran checksums on every file in the specified directories.

Version 2.0 uses file size comparisons to greatly reduce the need for checksums. Tests on a variety of directories and file systems show it to be about 9x-11x faster than v. 1.0. Use this version for your needs.

The optimizations of v. 2.0 are discussed in this article in Oracle's Java Magazine

v. 1.0 Initial Release

Version 1.0. This is the version described in the article in Oracle's Java Magazine on writing command-line utilities.

See the wiki page for this project for details on usage.