string length: 20
                Rate reversestr substr_lhs regexsubst substr_rhs
reversestr 1120993/s         --       -12%       -13%       -48%
substr_lhs 1273691/s        14%         --        -1%       -41%
regexsubst 1289977/s        15%         1%         --       -40%
substr_rhs 2144546/s        91%        68%        66%         --
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string length: 200
                Rate reversestr regexsubst substr_lhs substr_rhs
reversestr  741492/s         --       -37%       -39%       -61%
regexsubst 1172942/s        58%         --        -3%       -39%
substr_lhs 1211322/s        63%         3%         --       -37%
substr_rhs 1915850/s       158%        63%        58%         --
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string length: 2000
               Rate reversestr substr_lhs regexsubst substr_rhs
reversestr 145793/s         --       -82%       -82%       -84%
substr_lhs 795724/s       446%         --        -4%       -11%
regexsubst 828896/s       469%         4%         --        -7%
substr_rhs 894365/s       513%        12%         8%         --
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string length: 20000
               Rate reversestr substr_rhs regexsubst substr_lhs
reversestr  16427/s         --       -86%       -92%       -92%
substr_rhs 119927/s       630%         --       -39%       -41%
regexsubst 197394/s      1102%        65%         --        -3%
substr_lhs 202514/s      1133%        69%         3%         --
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