C:\test>1036622 -N=1e3
                  Rate grep build_new_array offset_copy edit_in_place for_splice
grep            1464/s   --            -20%        -43%          -61%       -65%
build_new_array 1820/s  24%              --        -29%          -52%       -56%
offset_copy     2578/s  76%             42%          --          -32%       -38%
edit_in_place   3803/s 160%            109%         48%            --        -8%
for_splice      4144/s 183%            128%         61%            9%         --

C:\test>1036622 -N=1e4
            (warning: too few iterations for a reliable count)

                 Rate  grep build_new_array offset_copy edit_in_place for_splice
grep            159/s    --            -25%        -44%          -62%       -66%
build_new_array 212/s   33%              --        -26%          -49%       -54%
offset_copy     287/s   80%             36%          --          -31%       -38%
edit_in_place   419/s  163%             98%         46%            --       -10%
for_splice      464/s  191%            119%         62%           11%         --

C:\test>1036622 -N=1e5
                  Rate grep build_new_array offset_copy for_splice edit_in_place
grep            15.4/s   --            -22%        -50%       -69%          -70%
build_new_array 19.8/s  28%              --        -36%       -60%          -62%
offset_copy     31.0/s 102%             57%          --       -37%          -40%
for_splice      49.6/s 222%            151%         60%         --           -4%
edit_in_place   51.6/s 235%            161%         66%         4%            --

C:\test>1036622 -N=1e6
                  Rate grep build_new_array offset_copy edit_in_place for_splice
grep            1.60/s   --            -23%        -51%          -70%       -71%
build_new_array 2.06/s  29%              --        -37%          -61%       -62%
offset_copy     3.28/s 105%             59%          --          -38%       -40%
edit_in_place   5.26/s 229%            155%         60%            --        -4%
for_splice      5.49/s 243%            166%         67%            4%         --