Or as a one-liner :)
perl -Mthreads=async -le"async{ system 'dir'; } for 1 .. 100"
Examine what is said, not who speaks.
"Efficiency is intelligent laziness." -David Dunham
"Think for yourself!" - Abigail
"Memory, processor, disk in that order on the hardware side. Algorithm, algoritm, algorithm on the code side." - tachyon