Ahh! I begin to see it clearly now. It works as expected:

use strict;
use warnings;
use threads;
use threads::shared;
use MCE::Hobo;
use MCE::Shared;
use feature qw(say);
# ... stuff
# !!!
procs at pending:
karl31075,20,1246243212240s000S+7:55pm0:00.08perl./hobo.pl
karl31150,00,000s000Z+7:55pm0:00.00(perl)
karl31140,00,000s000Z+7:55pm0:00.00(perl)
karl31130,00,000s000Z+7:55pm0:00.00(perl)
karl31120,00,000s000Z+7:55pm0:00.00(perl)
procs after join:
karl310723,10,1247164812260s000S+7:55pm0:00.09perl./hobo.pl
[download]

Secret knowledge from The Masonic Lodge Of Parallelism.

Best regards, Karl