Short: very fast LZ77 xpk compression library Type: util/pack Uploader: roques@karlsruhe.gmd.de Author: roques@juliet.ka.sub.org xpkFAST is an XPK compression sublibrary whose main purpose is to be fast. The most interesting part of FAST is its speedy compressor, which makes it predestined for applications which compress about as often as they decompress. Good examples are: backup systems which make use of XPK to support compressed backups or compressing filesystems. FAST is a member of the LZ77 family of datacompressors. Other popular members are: xpkNUKE, PowerPacker, Imploder and parts of LhA, [g]zip, zoo, shrink and freeze. Below are the xBench-marks for xpkFAST. They were made on an A3000/25 with SCRAM, using the AmigaVision executable as data. Note that memory requirements in this table do not include xpkmaster.library's buffers. Method Mode Packing Unpacking Packing Unpacking Compression Memory Memory Speed Speed Ratio ------ ------- ------- --------- ------- --------- ----------- FAST 0..79 64K 0K 428 K/s 1055 K/s 32.7% FAST 80..100 272K 0K 70 K/s 1096 K/s 39.3%