stress test using phantomjs

phantomstress.sh

#!/bin/bash

Requests=$1
Concurrency=$2
URL=$3

CheckInterval=0

for r in $(seq $Requests)
do
        while [ $(pgrep -c phantomjs) -ge $Concurrency ]
        do
                sleep $CheckInterval
        done
        phantomjs rasterize.js $URL /dev/null &
done

#for leftover phantomjs processes in memory
while [ $(pgrep -c phantomjs) -gt 0 ]
do
        sleep $CheckInterval
done