[eharvey@simon trash]$ for f in layout-*/layout.oa ; do echo "-------------------- $f" ; time gzip -c $f > ${f}.gz6 ; du -sh ${f}.gz6 ; done
-------------------- layout-19628/layout.oa

real    0m0.005s
user    0m0.000s
sys     0m0.002s
4.0K    layout-19628/layout.oa.gz6
-------------------- layout-19637/layout.oa

real    0m3.960s
user    0m3.839s
sys     0m0.020s
7.6M    layout-19637/layout.oa.gz6
-------------------- layout-20548/layout.oa

real    0m4.500s
user    0m4.368s
sys     0m0.027s
8.0M    layout-20548/layout.oa.gz6
-------------------- layout-21963/layout.oa

real    0m3.694s
user    0m3.654s
sys     0m0.039s
8.5M    layout-21963/layout.oa.gz6
-------------------- layout-21993/layout.oa

real    0m3.705s
user    0m3.668s
sys     0m0.034s
8.5M    layout-21993/layout.oa.gz6
-------------------- layout-22016/layout.oa

real    0m3.719s
user    0m3.687s
sys     0m0.031s
8.5M    layout-22016/layout.oa.gz6
-------------------- layout-22369/layout.oa

real    0m3.723s
user    0m3.689s
sys     0m0.034s
8.6M    layout-22369/layout.oa.gz6
-------------------- layout-22529/layout.oa

real    0m3.775s
user    0m3.714s
sys     0m0.057s
8.6M    layout-22529/layout.oa.gz6
-------------------- layout-22644/layout.oa

real    0m3.735s
user    0m3.701s
sys     0m0.029s
8.6M    layout-22644/layout.oa.gz6
-------------------- layout-22678/layout.oa

real    0m3.933s
user    0m3.705s
sys     0m0.026s
8.6M    layout-22678/layout.oa.gz6
-------------------- layout-22679/layout.oa

real    0m3.931s
user    0m3.693s
sys     0m0.037s
8.6M    layout-22679/layout.oa.gz6
-------------------- layout-22825/layout.oa

real    0m3.963s
user    0m3.722s
sys     0m0.039s
8.7M    layout-22825/layout.oa.gz6
-------------------- layout-22948/layout.oa

real    0m3.993s
user    0m3.763s
sys     0m0.028s
8.7M    layout-22948/layout.oa.gz6
-------------------- layout-HEAD/layout.oa

real    0m4.328s
user    0m4.290s
sys     0m0.032s
8.7M    layout-HEAD/layout.oa.gz6