A new parallel module was recently added to CPAN called MCE. This is how one could run 2 functions in parallel using MCE.

#!/usr/bin/perl
use 5.014;

use MCE;

my $mce = MCE->new(
   max_workers => 2,

   user_func => sub
   {
      my $self = shift;

      if ($self->wid == 1)
      {
         test1();
      }
      else
      {
         test2();
      }
   }
);

$mce->run();

sub test1
{
   sleep 3;
   say "in test1";
}

sub test2
{
   sleep 2;
   say "in test2";
}
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Output

in test2
in test1
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