p:\test>Bench -P -N=-1 >log
             Rate describe1 describe2 describe3 describe4
describe1  4458/s        --      -25%      -71%      -73%
describe2  5907/s       32%        --      -62%      -65%
describe3 15361/s      245%      160%        --       -8%
describe4 16639/s      273%      182%        8%        --