CorePack Compression methods ? Help

[FitGirl]

Typical Corepack string looks like this, afair:

srep+delta+lzma:177mb:fb273:lc8

It's generic and well-known, aside of using delta, which should never be used by default, as it make compression worse in 90% of cases, make it slightly better in 8% of cases and only in 2% of cases gives noticeable compression gain with LZMA. These numbers based on my huge bruteforcing database I build through my repacking.

I told about it to Shiv in the beginning of 2015, but he doesn't like to learn, so the delta is still in there.

So if you copied your compression string with delta from someone else - get rid of it and never use blindly. Delta is a very specific byte-mixing filter, which can help only with certain types of data.

And yes, as stated above, CP's "records" are build on ripping data, not on actual compression.