11.2-02   wo/check
real	307m5.649s
user	980m28.884s
sys	78m37.832s

11.2-04   w/check
real	359m5.233s
user	1252m12.024s
sys	36m29.926s

12.1
real	260m23.165s
user	838m9.459s
sys	21m5.755s

12.1-03 wo/check
real	256m21.812s
user	854m7.059s
sys	20m56.386s