ok 1 - manual
ok 2 - regex - substring
ok 3 - substring - array
              Rate     regex substring     array
regex     313491/s        --      -21%      -36%
substring 398041/s       27%        --      -19%
array     488419/s       56%       23%        --
ok 4 - regex - substring
ok 5 - substring - array
             Rate substring     array     regex
substring 18505/s        --      -15%      -15%
array     21765/s       18%        --       -0%
regex     21765/s       18%        0%        --
1..5