Method                            before      after          ratio
String#casecmp                    0.001576    0.001371       0.869924
String#capitalize!                0.044351    0.036540       0.823882
String#lstrip!                    0.000808    0.000664       0.821782
String#rstrip                     0.001254    0.001029       0.820574
String#rjust(width)               0.033928    0.025527       0.752387
String#center                     0.060221    0.039046       0.648378
String#count(string)              0.113621    0.061282       0.539355
String#ljust                      0.028050    0.012963       0.462139
String#*                          0.004646    0.001492       0.321136
String#count(^string)             0.233607    0.058080       0.248623
String#delete!                    0.104085    0.020470       0.196666
String#delete                     0.132628    0.023297       0.175657
String#squeeze('m-n')             1.087654    0.117052       0.107619
String#squeeze!('m-n')            1.088081    0.113138       0.103979
String#squeeze(char)              0.716838    0.038196       0.053284
String#squeeze!(char)             0.747981    0.038166       0.051025
String#squeeze!                   0.690313    0.027576       0.039947
String#squeeze                    0.749358    0.027760       0.037045