I don't think that the zip format is that powerful.The defaults for the GUI application file-roller can also be changed: I don't use Winzip, but every other zip utility I have ever used automatically selects the best compression algorithm on a per-file basis.
zip, most of the time 7-Zip archives are so much smaller that one can add the SFX stub and still have a smaller file. (As in, needs 512 MB to compress, and probably at least 256 to decompress. It is possible to really tune the compression settings to squeeze very last bit out of your data, but those tunings very from fileset to fileset, and you can end up eating LOTS of RAM. It handles these MUCH better than even WinRAR can. As an example of where 7-Zip REALLY shines, grab a bunch of XP Visual Styles from or and recompress them with 7-Zip. The "default" maximum settings (-mx) can sometimes beat Rar, but sometimes not. ace archives, I'd be set.Īs far as "best compression" goes, it varies depending on content and tuning of the compression parameters. Overall, it's highly competitive to Rar, and it's free/open source.
The same seems to go for just about every other archiver worth its salt on the planet. I don't think that Winzip uses Maximum by default (definitely not for the 9.0 beta, because of the Deflate64 support), but I believe that it does remember the previous setting used. exe files & others won't be able to open it unless they have 7zip installed) zip files for most things (if emailing things, remember that lots of servers will block. It's free & a fairly small app, so why not just install it & see what you think - My view is that it has advantages in some situations, but generally I'll keep using. However, the compression is slow - I haven't done any measured tests, but I'd say that compressing with 7zip compression takes about 5 times longer than compressing to a zip file with winzip. It lets you create self extracting files with 7zip compression & has encryption capabilities. The program itself (which AFAIK is still in beta) is basic compared to Winzip etc, but does read most common formats & write to a smaller range of formats. a 5.6Mb file will compress to 2.8 with zip compression, or 2.35 with 7zip. Generally files that I'm compressiong are AutoCAD files - Eg. Of the compressors that I have tried, yes 7zip does have the highest compression ratio in the all the test cases that I have given it.
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