use Benchmark;

my $tests = [qw(these are a few test to try
                andaverylongteststring
                acoupleoftimesover
                xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
                zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
zzzzzzzzzzzzzzzzzzzzzzzzzzzzz)];

timethese (100000, {
NoOpLoop =>
sub {
  for my $test (@$tests) {
    # NO Op Loop
  }
},
regex1 =>
sub {
  for my $test (@$tests) {
    $test=~s/^(.*)(.)$/\L$1\U$2/;
  }
},
substr =>
sub {
  for my $test (@$tests) {
    $test= lc(substr($test, 0, length($test)-1))
           . uc(substr($test, -1, 1));
  }
},
reverse=>
sub {
  for my $test (@$tests) {
    $test=reverse ucfirst lc reverse $test;
  }
}
});