Number of Hashes = 1579338
Number of Values = 6317357
Number of Hashes Filtered = 1369612
Number of Values Filtered = 4362177
Filtering 87% Hashes
Filtering 69% Values
           s/iter map_grep_2      slice   map_grep  recursive  iterative
map_grep_2   10.7         --        -0%        -3%        -6%        -6%
slice        10.7         0%         --        -3%        -6%        -6%
map_grep     10.4         3%         3%         --        -3%        -3%
recursive    10.1         6%         6%         3%         --        -0%
iterative    10.0         7%         7%         3%         0%         --