Tuesday, November 24, 2009

Really impressed with 7-Zip

Update Aug 20, 2011:  Just found out that 7-Zip can also extract CD/DVD image files (.iso). Nice! Below are all the file formats it supports:
  • Packing / unpacking: 7z, XZ, BZIP2, GZIP, TAR, ZIP and WIM
  • Unpacking only: ARJ, CAB, CHM, CPIO, CramFS, DEB, DMG, FAT, HFS, ISO, LZH, LZMA, MBR, MSI, NSIS, NTFS, RAR, RPM, SquashFS, UDF, VHD, WIM, XAR and Z.
I have been using Winzip to compress files for as long as I can remember. One of my colleagues mentioned another compression tool called 7-Zip to me a couple of weeks ago and I am really impressed with the high compression ratio achieved by 7-Zip. Besides it's free and supports all compression file formats (.zip, .rar, .gz, .7z) that I know of. Below is a chart that compares the compressed file sizes between Winzip 10 and 7-Zip 4.65 on several files that I use for my daily work:

FileUncompressed .zip.7z%smaller
Virtex-6 UG365
5.4MB 4MB 26%
ADEPT 0.38.6 12.6MB5.3MB4.4MB17%
SP601 Base Reference Design rdf0003 56.3MB17.5MB10MB43%

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