Rate   subst  substm  precat  substr substrm precatm
subst   2104367/s      --    -10%    -29%    -48%    -61%    -72%
substm  2338582/s     11%      --    -21%    -43%    -57%    -69%
precat  2969268/s     41%     27%      --    -27%    -45%    -61%
substr  4071762/s     93%     74%     37%      --    -25%    -46%
substrm 5397081/s    156%    131%     82%     33%      --    -29%
precatm 7561845/s    259%    223%    155%     86%     40%      --