pl@nereida:~/Lperltesting$ ./comparequotedstrings.pl
                Rate gpossessive  gbacktrack
gpossessive 645439/s          --         -1%
gbacktrack  649435/s          1%          --
               Rate possessive  backtrack
possessive 694364/s         --        -0%
backtrack  696767/s         0%         --
                    Rate failgpossessive  failgbacktrack
failgpossessive 649435/s              --             -2%
failgbacktrack  659647/s              2%              --
pl@nereida:~/Lperltesting$