This slug has not much in common with the old one. It's a complete redesign. Only the name is the same because I was to lazy to think of another one.
That damn slug has become even slower (what do you expect, it's a slug) but does work more thoroughly. On my system its speed is comparable to "thor e3" - sometimes faster, sometimes slower. But its compression is better most of the time. The ratio is in-between e3 and e4.
Seriously, many things are lackluster. e.g. the IO-handling is stupid. Or the handling of already compressed data is naive. But the algorithmic concept is nice. Slug isn't LZ77 anymore - it borrows some aspects from ROLZ and adds some magic to it. It still uses semi-dynamic huffman as backend.
I think that I can extend the 'ROLZ' further to provide higher compression at a slight speed hit. But on the other hand, maybe the next version will already use another concept.
If you find any bugs/errors please let me know.
I'm looking forward to some numbers from the benchmarkers. Besides, I tried adding slug to 'metacompressor.com'. Does anybody know what todo with the field 'code'?