Number of Hashes = 305798
Number of Values = 4892785
Number of Hashes Filtered = 268718
Number of Values Filtered = 3435051
Filtering 88% Hashes
Filtering 70% Values
           s/iter map_grep_2   map_grep      slice  recursive  iterative
map_grep_2   6.29         --        -1%        -8%       -10%       -16%
map_grep     6.22         1%         --        -7%        -9%       -15%
slice        5.81         8%         7%         --        -2%        -9%
recursive    5.68        11%        10%         2%         --        -7%
iterative    5.27        19%        18%        10%         8%         --