$ pm_1170300_bench_split_limit.pl; pm_1170300_bench_split_limit.pl; pm_1170300_bench_split_limit.pl; pm_1170300_bench_split_limit.pl; pm_1170300_bench_split_limit.pl
                 Rate nolim_array limit_array nolim_undef limit_undef
nolim_array  346500/s          --        -68%        -68%        -77%
limit_array 1071811/s        209%          --         -2%        -29%
nolim_undef 1090513/s        215%          2%          --        -27%
limit_undef 1499250/s        333%         40%         37%          --
                 Rate nolim_array limit_array nolim_undef limit_undef
nolim_array  355492/s          --        -64%        -68%        -76%
limit_array 1000000/s        181%          --        -10%        -32%
nolim_undef 1107420/s        212%         11%          --        -24%
limit_undef 1461988/s        311%         46%         32%          --
                 Rate nolim_array limit_array nolim_undef limit_undef
nolim_array  346981/s          --        -68%        -69%        -76%
limit_array 1096491/s        216%          --         -1%        -24%
nolim_undef 1111111/s        220%          1%          --        -23%
limit_undef 1445087/s        316%         32%         30%          --
                 Rate nolim_array nolim_undef limit_array limit_undef
nolim_array  359195/s          --        -67%        -67%        -76%
nolim_undef 1089325/s        203%          --         -0%        -27%
limit_array 1092896/s        204%          0%          --        -27%
limit_undef 1492537/s        316%         37%         37%          --
                 Rate nolim_array nolim_undef limit_array limit_undef
nolim_array  362319/s          --        -68%        -68%        -76%
nolim_undef 1114827/s        208%          --         -1%        -26%
limit_array 1127396/s        211%          1%          --        -25%
limit_undef 1506024/s        316%         35%         34%          --