Dzip v2.82: 0:29 to compress to less than half of anything else
WinZip v8.1: 0:32 (all tests using 'Maximum' compression option
WinRAR v3.0: 1:25 (all tests using 'Best' compression and 4k dictionary size)
WinAce v2.11: 1:27 (all tests using 'Maximum' compression and 4k dictionary size)

Note: All times are in minutes:seconds.

Comparison of Dzip to other programs by compressing my Microsoft Office folder, which had 107 MB in 311 files and 20 folders

Dzip: 1:16
WinZip: 3:34
WinRAR: 3:40
WinAce: 5:47

Dzip barely lost to WinZip on size, but was much faster than every program.

Comparison of Dzip to other programs by compressing tens of thousands of tiny files. It is not meant to test file size, but instead the time the program takes to do stuff with so many files.

Program	Time to compress files	Time to open finished archive	Time to test finished archive
Dzip	5:33	0:01	0:04
WinZip *	5:13	0:11	0:40
WinRAR	6:58	0:05	0:24
WinAce	24:44	1:01	8:47

Dzip is the clear winner for everything because WinZip could not even compress so many files. It took 2:23 just to error with 'too many files', so the times for WinZip are only compressing 60000 files. IMHO WinAce is just pathetic in this category.

All tests were done on my p3-450 MHz with 320 MB RAM under Windows 2000, using the task manager to measure the application's CPU time.