Test average response times for jQuery from Google and jQuery CDNs

jquery-cdn-test.sh

#!/bin/bash

## Set the url
if [[ "$1" == "google" ]]; then

    URL="ajax.googleapis.com/ajax/libs/jquery/2.0.3/jquery.min.js"

elif [[ "$1" == "jquery" ]]; then

    URL="code.jquery.com/jquery-2.0.3.min.js"

else

    echo "Usage: $0 { google | jquery } [ ITTERATIONS ]"
    exit 1

fi

## Echo status
echo -n "Calculating ..."

## Default
TOTAL_TIME=0

if [[ $2 > 0 ]]; then

    while [[ $COUNTER -lt $2 ]]; do

        ## Start timer
        TIMER_START=$(date +%s%N)

        ## Fetch jQuery
        wget -q -O /dev/null --no-cache https://$URL

        ## Stop timer
        TIMER_STOP=$(date +%s%N)

        ## Set request time
        TIME=$((($TIMER_STOP - $TIMER_START ) / 1000000))

        ## Store total for later calculation
        TOTAL_TIME=$(($TOTAL_TIME + $TIME))

        ## Echo current time
        echo -n " ${TIME}"

        ## Increment counter
        ((COUNTER++))

        ## Sleep
        sleep 1

    done

else

    echo "Usage: $0 { google | jquery } [ ITTERATIONS ]"
    exit 1

fi

## Calculate average
AVERAGE=$(($TOTAL_TIME / $2))

echo
echo "Average response time: ${AVERAGE} milliseconds"