Looping in parallel using bash

bash-in-parallel.sh

function wait_run_in_parallel()
{
    local number_to_run_concurrently=$1
    if [ `jobs -np | wc -l` -gt $number_to_run_concurrently ]; then
        wait `jobs -np | head -1`
    fi
}

function get_status() {
  local line=$1

  id=$(echo $line | cut -d ' ' -f 1)
  url=$(echo $line | cut -d ' ' -f 2)

  status=$(curl -s -I $url | head -n 1 | gsed -E "s/HTTP\/1.1 ([0-9]+) .*/\1/")
  echo "${id} => ${url} => ${status}"
}

while read line
do
  get_status "$line" &
  wait_run_in_parallel 50
done
wait

e lendo faz todo o sentido do mundo... dá aquela sensação... "como não pensei nisso?"