stresstest.sh

#!/bin/bash
# Run it like:
#  bash <(curl -sk <THIS_FILE>)

tasks=0
i=0
(dd if=/dev/urandom of=testfile count=20 bs=1024 2>&1) > /dev/null
init_time=$(($(date +%s%N)/1000000))

function execProc {
   md5sum testfile > /dev/null
   expr $i + 1 > /dev/null
}

while [ $tasks -lt 1000 ]
do
        execProc &
        tasks=`expr $tasks + 1`
done

end_time=$(($(date +%s%N)/1000000))
calc_time=$(expr $end_time - $init_time)
echo time for 1000 interactions=${calc_time}ms
rm -f testfile