FindDupFiles Find duplicate files with the same size and MD5 checksum
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FindDupFiles Description

FindDupFiles is a handy and reliable application designed to identify duplicate files by searching based on size and MD5 checksum. When you collect large numbers of files, there are, no doubt, duplicates with the same file under two different names or in more than one place. FindDupFiles won't find files that are merely similar, such as two consecutive photos of the same subject, or two MP3 songs encoded at different times. Possible duplicates are reported to the user, who can then verify that the files are identical, either by inspection or by doing a byte-by-byte comparison with the "comp" command in DOS/Windows or the "cmp" command in UNIX. What to do with files is the user's choice; the program does nothing except report the duplicates. The probability of two different files having the same size and MD5 checksum is extremely small. To avoid wasting CPU time, MD5 checksums are only calculated if two or more files have the same size. This program took two minutes on an Intel Pentium 4 processor at 2.4 GHz to scan a collection of 16,362 font files of various sizes up to 39.6 MB and using a total of 5.2 GB. Almost half of the files (7,393) had the same size as another file, which forced the MD5 to be computed. Peak memory usage was under 23 MB when run as a graphical application, and 12 MB when run as a console application.

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