« on: May 06, 2021, 09:50 PM »
7-Zip vs WinRAR vs WinZip
Compression Rate7-Zip vs WinRAR vs WinZip – Compression Rate and File Size
As for the compression rate and the output file size, 7-Zip, WinRAR and WinZip don’t differ too much. But the output format you choose can make a difference.
For instance, when you choose .zipx format rather than .zip format when using WinZip for file compression. The ZIPX format has a higher compression ratio than ZIP. If you choose 7Z format instead of ZIP format using 7-Zip to compress files, 7Z format would have a much higher compression ratio than ZIP format.
Based on test, to compress 1.5 GB of video files, 7-Zip delivers the highest compression rate, WinRAR comes as the second, while WinZip provides a compression ratio that is about 6% lower than 7-Zip. But if you choose the advanced compression format .zipx when using WinZip, its compression ratio is almost the same with 7-Zip.-KodeZwerg (May 06, 2021, 08:01 PM)
Just mentioned it to clear things up, or was posting a result of "7-Zip is 75% better than WinZip" a joke that belong in here?
Not a joke at all. And I wouldn't have mentioned those results if I had not been able to do so myself, about 3 to 4 times a week. If the person from the article you quoted couldn't reach those results, he/she didn't play enough with the available settings. In any of the archivers. By all means, play around with dictionary sizes and word sizes inside these archivers. And a whole new world will open to you.
And why did that person choose video files for compression? If there is one type of file that always delivers negligible compression results, it is video. And MP3 files too. If you wish to compress video files significantly, try different (re-)encoding them with a different codec, such as the x265 codec. Sure, the encoded file may not play anymore on your Smart TV directly (if it only supports the x264/H264 codec), but play just fine with VLC/PotPlayer/Media Player Classic/GOMPlayer/etc. on your desktop/laptop and you will hardly see any difference watching a video file that is 600 MByte (x265) and its original of 2,4 GByte (x264). No archiver will come close to those results.
Files such as database dump files, log files (for auditing purposes/troubleshooting) etc., these file-types are very much compressible. Database dump files I encounter on a daily basis of 20+ Gigabytes each, compressing these with 7zip and ending up with an archive of each that is around 400 MByte. On rare occasions even less. Neither zip or rar are able to come close.
It's no skin of my back if you choose to disregard though. After all, if you are happy with your solution, more power to you.