Thank you for you reply, Well, I simplified. For example, replace print($string,"\n"); with ($ouput1, $output2, $output3 ) = &some_subroutine($string); whereas some_subroutine is definded as follows: 
sub some_subroutine 
{
        my ($string) = @_;
    my ($output1, $output2, $output3);

    if (  $string eq $some_other_string_a )
    {
           $output1 = 1350;
           $output2 = 9234;
           $output3 = 8889;
    }
    if ( $string eq $some_other_string_b )
    {
           $output1 = 1345;
           $output2 = 2234;
           $output3 = 3689;
    }
    if ( $string eq $some_other_string_c )
    {
           $output1 = 2256;
           $output2 = 3370;
           $output3 = 1340;
    }
    @retval = ($output1,$output2,$output3);
}

[download]
so the code looks like 
#!/usr/bin/perl
use Parallel::ForkManager;

@all_strings=('110110101000101111', 
              '110010101001011101', 
              '110110111001001110',
              '110011101001011100',
              '111010101001011100');

my $pm = new Parallel::ForkManager(4);
foreach $string (@all_strings)
{
  my $pid = $pm->start and next;
  ($ouput1, $output2, $output3 ) = some_subroutine($string);
  $pm->finish;
}
$pm->wait_all_children;

[download]
Or do you have an simple example that really works?

In reply to Re^2: Parallel::ForkManager is time consuming...takes too long by esolkc
in thread Parallel::ForkManager is time consuming...takes too long by esolkc

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