Elle.7z

: Increasing the number of threads to match your CPU's logical processors can speed up the compression process, though it may slightly increase the final archive size.

: Best for files you don't need to access frequently, as individual file extraction is slower than in non-solid archives. Elle.7z

7-Zip / Discussion / Help: 7-zIp And Compression Noob - SourceForge : Increasing the number of threads to match

: Reducing the dictionary size can help if you are low on RAM, but it will generally result in a larger file. Best Use Cases Elle.7z