map { $module->target($_); 
      my $results = $module->process(); 
      (); } @objects;

##</code><code>##

use Benchmark 'cmpthese';
                                                                                
my @objects = (1 .. 100_000);
                                                                                
cmpthese( -1, {
  map1 => sub { map { my $xyz = $_ + 1000; undef $xyz; } @objects; 1; },
  map2 => sub { map { my $xyz = $_ + 1000; ();         } @objects; 1; },
  for  => sub { for (@objects) { my $xyz = $_ + 1000; undef $xyz } 1; }
});


__END__
Benchmark: running for, map1, map2 for at least 1 CPU seconds...
       for:  1 wallclock secs ( 1.10 usr +  0.01 sys =  1.11 CPU) @ 11.71/s (n=13)
      map1:  1 wallclock secs ( 1.08 usr +  0.00 sys =  1.08 CPU) @  7.41/s (n=8)
      map2:  2 wallclock secs ( 1.06 usr +  0.00 sys =  1.06 CPU) @ 10.38/s (n=11)
       Rate map1 map2  for
map1 7.41/s   -- -29% -37%
map2 10.4/s  40%   -- -11%
for  11.7/s  58%  13%   --