rack 64 xz, "XZ Compression 5.2.4 - Compressing ubuntu-16.04.3-server-i386.img, Compression Level 9", Lower Results Are Better "Unknown - Huawei Hi1710 [iBMC Intelligent Management",31.921,35.34,32.602,34.312,31.947,31.82,31.307,30.6,31.822,31.989,30.947,32.416,30.962,33.799,33.745