You may consider this instead of your mysub:

use IPC::Run qw( run );
use feature qw(say);

say alien( q(echo), q(fubar) );

sub alien {
   my ($command, $arg) = @_;
   run qq($command $arg);
}

[download]

As also recommended by bliako.

«The Crux of the Biscuit is the Apostrophe»

In reply to Re: Perl threads loss of performance with system call by karlgoethebier
in thread Perl threads loss of performance with system call by daniel85

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