Randall Farmer, 21/01/2014 23:26:
Trying to get quick-and-dirty long-range matching into LZMA isn't
feasible for me personally and there may be inherent technical
difficulties. Still, I left a note on the 7-Zip boards as folks
suggested; feel free to add anything there:
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I see you got more pointers there. :) Did you manage to explore them?
The blocker is that I didn't hear much interest from dump folks in a non-7z
archive format even if it boosted compression speed a lot. Of the packers
Bulat replied with (zpaq, exdupe, pcompress, his own srep), exdupe and srep