This lz4 addon requires lz4 binary library to encode and decode lz4 raw and frame blocks. For Linux, if lz4 had not been installed, then install it by # Debian derivatives $ sudo apt-get install lz4 # Redhat derivatives $ sudo dnf install lz4 For Windows and Mac, lz4 binary is bundled with the addon. See test1.ijs for benchmark with zlib.