fastLZ4 : compression levels -10...-19 are designed to give better decompression speed than LZ4 i.e. over 2000 MB/s
LIZv1 : compression levels -20...-29 are designed to give better ratio than LZ4 keeping 75% decompression speed
fastLZ4 + Huffman : compression levels -30...-39 add Huffman coding to fastLZ4
LIZv1 + Huffman : compression levels -40...-49 give the best ratio (comparable to zlib and low levels of zstd/brotli) at decompression speed of 1000 MB/s.