![Need help choosing what setting i should use in 7Zip to compress really old files : r/AskComputerScience Need help choosing what setting i should use in 7Zip to compress really old files : r/AskComputerScience](https://preview.redd.it/need-help-choosing-what-setting-i-should-use-in-7zip-to-v0-cpisgj0ha52a1.png?width=626&format=png&auto=webp&s=1d5d775788858b678a8ece39bded2cad77046ed5)
Need help choosing what setting i should use in 7Zip to compress really old files : r/AskComputerScience
![Luca Hammer on X: "Conclusion: PPMd gave me the best compression results for a 64MB JSON file. Small size (4MB) and super fast (7 seconds). Other algorithms that are available in 7zip Luca Hammer on X: "Conclusion: PPMd gave me the best compression results for a 64MB JSON file. Small size (4MB) and super fast (7 seconds). Other algorithms that are available in 7zip](https://pbs.twimg.com/media/EFtaPmHWsAAZIIT.png)
Luca Hammer on X: "Conclusion: PPMd gave me the best compression results for a 64MB JSON file. Small size (4MB) and super fast (7 seconds). Other algorithms that are available in 7zip
![7-Zip / Discussion / Open Discussion: Old Encryption/Compression Method incompatible with newer 7zip versions? 7-Zip / Discussion / Open Discussion: Old Encryption/Compression Method incompatible with newer 7zip versions?](https://sourceforge.net/p/sevenzip/discussion/45797/thread/127e5b497e/f9f7/attachment/7-Zip-1.jpg)