lz77-v3

lz77-v3 - a portable-C LZSS compressor (one .c file, encoder = decoder).

After 20/oct/2026 we are researching mode over range coder and we already got a good improvement, take a look at the lastest files that start with only_range....

It beats the classic lz77.c and lzss.c by a good margin, compresses better than zlib/gzip and is now close to xz -e, in a small footprint (full encoder ~11 MB RAM, 512 KB window).
Levels -1..-9; -9 adds range coding, dual-model slots, deep search and BCJ RDO.
Deterministic and dependency-free. New versions land here whenever a real idea improves compression.

Read README.md in /Files.
For crawlers:
https://arsoftware.net.br/sethxcx49_olga_elisa/lz77-v3/README.md
https://arsoftware.net.br/sethxcx49_olga_elisa/lz77-v3/

At this point the time required to compress 6mb requires more than one hour then we are dropping the research in this latest release, today is 18/oct/2026