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#!/usr/local/bin/perl -w
use strict;
...
);

exit;

Benchmark: timing 500000 iterations of Method One UC, Method Three s, 
+Method Two TR...
Method One UC:  1 wallclock secs ( 1.42 usr +  0.00 sys =  1.42 CPU) @
+ 352112.68/s (n=500000)
Method Three s: 16 wallclock secs (17.03 usr +  0.00 sys = 17.03 CPU) 
+@ 29359.95/s (n=500000)
Method Two TR:  1 wallclock secs ( 2.04 usr +  0.00 sys =  2.04 CPU) @
+ 245098.04/s (n=500000)

 my $data = 'for-bar-baz';
   $data =~ s/-/_/g;
...
 my $data = 'for-bar-baz';
 $data =~tr/-/_/;
 print $data;

Benchmark: timing 500000 iterations of Method One TR, Method Two s...
Method One TR:  2 wallclock secs ( 1.87 usr +  0.00 sys =  1.87 CPU) @
+ 267379.68/s (n=500000)
Method Two s:  5 wallclock secs ( 4.84 usr +  0.00 sys =  4.84 CPU) @ 
+103305.79/s (n=500000)