Compression: 7zip vs the rest, random files

I did a few quick tests on some random files while I was testing compression of VMware images. Basically I just grabbed 100MB of files from the sets that I normally archive regularly and tried them on the programs I had available. The file set was small enough that most programs completed in a couple of minutes (except WinRK which took more than an hour each time). Raw results and batch file here

I tested 7zip, BZip2, GZip and WinRK. The interesting thing for me was that none of them is really worth using for the compression side. For converting a pile of files into one file that can be moved and archived easily any of them except WinRK will do fine.

Installers

A random collection of installers.

MB%Filename
116.9501.000installset.tar
115.3190.986install-mx1.7z
115.2680.986install-mx9-0-32.7z
115.2660.986install-mx9-0-64.7z
115.2040.985installset.tar-1.bz2
115.1990.985installset.rk
115.0380.984installset.tar-7.bz2
115.0140.983installset.tar-9.bz2
114.9860.983installset.tar-5.bz2
114.9110.983installset.tar-8.bz2
114.8650.982install-mx5.7z
114.6950.981install-mx7.7z
114.6220.980install-mx9-n.7z
114.6220.980install-mx9.7z
114.4850.979install-mx9-1-32.7z
114.4830.979install-mx9-2-32.7z
114.4820.979install-mx9-2-255.7z
114.4820.979install-mx9-1-64.7z
114.4810.979install-mx9-2-96.7z
114.4810.979install-mx9-2-128.7z
114.4770.979install-mx9-2-64.7z
114.3480.978installset-1.tar.gz
114.2070.977installset-5.tar.gz
114.1920.976installset-9.tar.gz
114.1720.976install-zip5.zip
114.1580.976install-zip9.zip

Photos

I just grabbed about 60 files as they came out of my Canon 300D, roughly 3MP JPEG files shot with minimal JPEG compression.

MB%Filename
184.5941.000photo-mx9-0-32.7z
184.5931.000photo-mx9-0-64.7z
184.3450.999photo-mx1.7z
184.1560.998photo-mx5.7z
183.8550.996photo-mx7.7z
183.5760.994photoset.tar-1.bz2
183.4670.994photo-mx9.7z
183.4670.994photo-mx9-n.7z
183.2770.993photo-mx9-2-255.7z
183.2710.993photo-mx9-2-128.7z
183.2640.993photo-mx9-1-64.7z
183.2630.993photo-mx9-1-32.7z
183.2600.993photo-mx9-2-64.7z
183.2600.993photo-mx9-2-32.7z
183.2520.993photo-mx9-2-96.7z
183.1620.992photoset.tar
183.0570.992photo-zip5.zip
183.0550.992photo-zip9.zip
182.9540.991photoset-5.tar.gz
182.9520.991photoset-9.tar.gz
182.9420.991photoset-1.tar.gz
182.7740.990photoset.tar-5.bz2
182.6450.989photoset.tar-7.bz2
182.5860.989photoset.tar-8.bz2
182.5530.989photoset.tar-9.bz2
179.6700.973photoset.rk

Website

I zipped my local copy of www.mozbike.com since it's small. It's all plain HTML with most of the volume being small jpegs.

MB%Filename
37.6011.000webset.tar
36.3080.966web-zip5.zip
36.3030.966web-zip9.zip
36.2720.965webset.tar-1.bz2
36.0880.960webset-1.tar.gz
36.0390.958webset-5.tar.gz
36.0330.958webset.tar-5.bz2
36.0270.958webset-9.tar.gz
36.0080.958webset.tar-8.bz2
36.0060.958webset.tar-7.bz2
35.9920.957webset.tar-9.bz2
35.9810.957web-mx1.7z
35.2400.937web-mx5.7z
35.1590.935web-mx7.7z
34.8940.928webset.rk
34.6590.922web-mx9-0-32.7z
34.6590.922web-mx9-0-64.7z
34.4330.916web-mx9-1-64.7z
34.4320.916web-mx9-1-32.7z
34.4320.916web-mx9-2-32.7z
34.4320.916web-mx9-2-128.7z
34.4320.916web-mx9-2-255.7z
34.4320.916web-mx9-2-96.7z
34.4310.916web-mx9-n.7z
34.4310.916web-mx9.7z
34.4310.916web-mx9-2-64.7z