Szip is a freeware portable general purpose lossless compression program. It has a high speed and compression, but high memory demands (up to 20MB) too. See the monthly Archive Comparison Test (A.C.T.) by Jeff Gilchrist for comparative results. Also check the Canterbury Corpus where szip is best compressor for large text files. 资源包括vs2013编译的32位的库和64位的库。