[eharvey@simon trash]$ for f in layout-*/layout.oa ; do echo "-------------------- $f" ; time gzip -c --fast $f > ${f}.gz1 ; du -sh ${f}.gz1 ; done -------------------- layout-19628/layout.oa real 0m0.001s user 0m0.000s sys 0m0.001s 4.0K layout-19628/layout.oa.gz1 -------------------- layout-19637/layout.oa real 0m0.817s user 0m0.789s sys 0m0.028s 7.8M layout-19637/layout.oa.gz1 -------------------- layout-20548/layout.oa real 0m1.320s user 0m0.926s sys 0m0.036s 8.7M layout-20548/layout.oa.gz1 -------------------- layout-21963/layout.oa real 0m1.000s user 0m0.973s sys 0m0.027s 9.2M layout-21963/layout.oa.gz1 -------------------- layout-21993/layout.oa real 0m1.101s user 0m0.972s sys 0m0.029s 9.2M layout-21993/layout.oa.gz1 -------------------- layout-22016/layout.oa real 0m0.999s user 0m0.971s sys 0m0.028s 9.2M layout-22016/layout.oa.gz1 -------------------- layout-22369/layout.oa real 0m1.100s user 0m0.970s sys 0m0.030s 9.1M layout-22369/layout.oa.gz1 -------------------- layout-22529/layout.oa real 0m1.058s user 0m0.983s sys 0m0.048s 9.2M layout-22529/layout.oa.gz1 -------------------- layout-22644/layout.oa real 0m1.111s user 0m0.977s sys 0m0.031s 9.2M layout-22644/layout.oa.gz1 -------------------- layout-22678/layout.oa real 0m0.999s user 0m0.969s sys 0m0.029s 9.1M layout-22678/layout.oa.gz1 -------------------- layout-22679/layout.oa real 0m1.106s user 0m0.978s sys 0m0.028s 9.2M layout-22679/layout.oa.gz1 -------------------- layout-22825/layout.oa real 0m1.147s user 0m0.984s sys 0m0.038s 9.3M layout-22825/layout.oa.gz1 -------------------- layout-22948/layout.oa real 0m1.041s user 0m1.019s sys 0m0.022s 9.3M layout-22948/layout.oa.gz1 -------------------- layout-HEAD/layout.oa real 0m1.139s user 0m1.006s sys 0m0.033s 9.3M layout-HEAD/layout.oa.gz1