Since it seems that we are a couple of forum users that brute force 7-zip compression with m7repacker. I am putting this thread here, where we can dump results for the best chosen compression method.
Hopefully once enough data is collected we will see some pasterns emerge of what compression method to use for certain file extension/data.
- Use only -M1 or -m3 method for this
- Only report double extension if you have used a third party preprocessing/filter
- Report size in approximate 100mb of a time. small files below 1mb reports as "<1mb"
- Report total size of all files for an extension if in the same block (-m1 method)
- make one post per archive made
Optional extended info would be compressed size compared to original size
This can help narrow down files that should not be compressed.
This is a little bad example since it contains iso files which are just a container format so i can have a lot of different stuff in it.Code:Version 7-zip: 16.04 Settings: -m1 -d1536 -mem1024 .iso (1.2GB) : BCJ2 LZMA2:30 LZMA:19:lc0:lp2 LZMA:19:lc0:lp2 .mds (<1mb) : Delta4 LZMA:16:lc0:lp1 .mdf.ecm (700MB) : LZMA:768m:lc9:pb0 .exe (<1mb) : BCJ2 LZMA:24m:lc7 LZMA:19:lc0:lp2 LZMA:19:lc0:lp2 .ogg (<100mb) : LZMA:24m:lc8:pb0 (Ratio: 98.5%)
I hope ppl will join in with some info and that it can help speed up m7repacker and/or help 7-zip basic to improve its compression rate