Average load time with curl

bang.sh

#!/bin/bash
total_load_time=0
total_runs=10

if [ -z "$1" ]; then
        host="http://localhost:3000"
else
        host=`echo $1`
fi

echo banging $host

for (( i=1; i<=$total_runs; i++ ))
do
        load_time=`curl -s -w "%{time_total}\n" -o /dev/null $host`
        #echo $load_time
        total_load_time=`echo $total_load_time+$load_time | bc`
done
avg=`echo $total_load_time/$total_runs | bc -l`
echo $avg