Here are some testing results of different LZW coders:
Test file ENWIK8 (size 100,000,000 bytes)
compress 4.3d (LZC with 16-bit dictionary):
LZWA16 (LZW+Flat arithmetic compression with 16-bit dictionary):
TC 4.3 (Enhanced LZC with 18-bit dictionary):
LZWA20 (LZW+Flat arithmetic compression with 20-bit dictionary):
pkzip 2.0.4 (Deflate):
LZW+ARI compressors still lightning fast and needs no memory, plus have fastest decompression, but compression is really poor and I think no reason to release a new compressor based on LZW+ARI! What do you think?