test.sh

max=200

duration=99999999

delay=10

URL=some_url


#####
#mkdir -p results
echo > results
while /bin/true
do
count=1
while [ $count -le $max ]
do  
   curl -o /dev/null -m $duration -s -w "bytes %{size_download} avg %{speed_download} " "$URL" >> results &
   curl -o /dev/null -m $duration -s -w "bytes %{size_download} avg %{speed_download} " "$URL" >> results &
   curl -o /dev/null -m $duration -s -w "bytes %{size_download} avg %{speed_download} " "$URL" >> results &
   curl -o /dev/null -m $duration -s -w "bytes %{size_download} avg %{speed_download} " "$URL" >> results &
   curl -o /dev/null -m $duration -s -w "bytes %{size_download} avg %{speed_download} " "$URL" >> results &
   curl -o /dev/null -m $duration -s -w "bytes %{size_download} avg %{speed_download} " "$URL" >> results &
   curl -o /dev/null -m $duration -s -w "bytes %{size_download} avg %{speed_download} " "$URL" >> results &
   curl -o /dev/null -m $duration -s -w "bytes %{size_download} avg %{speed_download} " "$URL" >> results &
   curl -o /dev/null -m $duration -s -w "bytes %{size_download} avg %{speed_download} " "$URL" >> results &
   curl -o /dev/null -m $duration -s -w "bytes %{size_download} avg %{speed_download} " "$URL" >> results &
   curl -o /dev/null -m $duration -s -w "bytes %{size_download} avg %{speed_download} " "$URL" >> results &
   [ "$delay" != "" ] && sleep $delay
   let count=$count+10
done
wait
done
echo "done"