获悉, With typical files, XZ Utils create 30 % smaller output than gzip and 15 % smaller output than bzip2.
测试如下：
普通文本：all-db-data-201310.sql / 3147104
compressed by zip: 732943,
compressed by gzip: 732790, less than orig at 23.28%
by bzip2: 593504, less than orig at 18.86%, smaller than gzip by 19.01%
by xz: 526584, less than orig at 16.73%, smaller than gzip by 28.14%, smaller than bzip2 by 11.28%.
xz介绍自己基本属实,值得在新的系统维护中使用和部署。
