With perl 5.12 are there any efficiency concerns to be aware of when returning a large arrays from a function?

E.g., does perl avoid copying of data in the following cases? 

sub large_array {
  my @large_array;
  ...populate @large_array...
  return @large_array;
}

sub large_array_ref {
  my $large_array_ref = [];
  ...populate @$large_array_ref...
  return $large_array_ref;
}

# Is the returned array copied?

@c = large_array();
@c = @{ large_array_ref() };

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In reply to returning large arrays from functions by perl5ever

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