script bash for performance testing on RESTful services. It measures quickly how long does it take accomplish http requests

gistfile1.txt

#!/bin/bash
START=$(date +%s.%N)
	
for i in {1..100};
do
curl http://localhosT:3000/rest -d '<request>'>/dev/null 2>&1
done;
END=$(date +%s.%N)
DIFF=$(echo "$END - $START" | bc)

echo "diff:"+$DIFF