Perl has a finer control over forking than any shell. It rivals the system C libraries in that regard. You may enjoy comparing your code to perl's native system calls for the job.

my %kid;
for (@commands) {
    defined(my $cpid = fork) or sleep 1, redo;
    $cpid and $kid{$cpid} = 1, next; # parent
    %kid = ();                       # child
    exec '/bin/bash', '-c', $_;      # thanks, ikegami
    exit 1;
}
delete $kid{+wait} while %kid;
print "@{[times]}\n";

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After Compline,
Zaxo

In reply to Re: Using perl to speed up a series of bash commands by transforming them into a single command that will run everything in parallel. by Zaxo
in thread Using perl to speed up a series of bash commands by transforming them into a single command that will run everything in parallel. by tphyahoo

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