well just posting a fun little benchmark i did
its the iso file for an x-file game
original size = 7.88GB (8.468.776.960 bytes)
7-zip lzma 192mb/273 = 6,01 GB (6.460.937.110 bytes)
srep64 = 4.19GB (4.504.471.592 bytes)
srep64 v1.00 -> 7-zip lzma 64mb/273 = 3,31 GB (3.562.574.200 bytes)
pretty amazing results from srep64 as preprocesor and/or standalone compression.
and it shows there is reall life files out there that benefits from huge dictionary size compression.
i wonder if rzm could get it even more down