MCE::Loop::init {
   max_workers => 4, parallel_io => 1, use_slurpio => 1;
};

$ time ./mce_loop_script.pl
nose cuke karl
nose cuke karl
nose cuke karl
nose cuke karl
nose cuke karl
nose cuke karl
nose cuke karl
nose cuke karl
nose cuke karl
nose cuke karl
Took 23.541 seconds

real    0m23.670s
user    0m51.046s
sys     0m 7.150s