Alain Kelder is a Giant Dork

Simple script to test website performance

This script is basically a simple wrapper around ab (apache bench), it's only value add is running a bunch of tests in a row, parsing out just the requests per second and caclulating an average across all runs. Simple script for a simple benchmark. The script doesn't verify the sanity of arguments provided to it, so if you're not sure, just use the command line in the example -- 100 reqs with concurrency of 50 -- good enough for a quick and dirty benchmark.

Example command line:

ak@hawk:~$ sudo ./ab.sh 10 100 50 http://giantdorks.org/

Output:

==================================================================
 Results
==================================================================
 site .......... http://giantdorks.org/
 requests ...... 100
 concurrency ... 50
------------------------------------------------------------------
 run 1: 	 4028.36 reqs/sec
 run 2: 	 4234.42 reqs/sec
 run 3: 	 4280.27 reqs/sec
 run 4: 	 4270.77 reqs/sec
 run 5: 	 4080.47 reqs/sec
 run 6: 	 4197.80 reqs/sec
 run 7: 	 2265.78 reqs/sec
 run 8: 	 4194.45 reqs/sec
 run 9: 	 3858.47 reqs/sec
 run 10: 	 4083.80 reqs/sec
------------------------------------------------------------------
 average ....... 3949.46 requests/sec

see ab.giantdorks.org.log for details

Here's the script:

#!/bin/bash

if ! [ -x "$(type -P ab)" ]; then
  echo "ERROR: script requires apache bench"
  echo "For Debian and friends get it with 'apt-get install apache2-utils'"
  echo "If you have it, perhaps you don't have permissions to run it, try 'sudo $(basename $0)'"
  exit 1
fi

if [ "$#" -ne "4" ]; then
  echo "ERROR: script needs four arguments, where:"
  echo
  echo "1. Number of times to repeat test (e.g. 10)"
  echo "2. Total number of requests per run (e.g. 100)"
  echo "3. How many requests to make at once (e.g. 50)"
  echo "4. URL of the site to test (e.g. http://giantdorks.org/)"
  echo
  echo "Example:"
  echo "  $(basename $0) 10 100 50 http://giantdorks.org/"
  echo 
  echo "The above will send 100 GET requests (50 at a time) to http://giantdorks.org. The test will be repeated 10 times."
  exit 1
else
  runs=$1
  number=$2
  concurrency=$3
  site=$4
fi

log=ab.$(echo $site | sed -r 's|https?://||;s|/$||;s|/|_|g;').log

if [ -f $log ]; then
  echo removing $log
  rm $log
fi

echo "=================================================================="
echo " Results"
echo "=================================================================="
echo " site .......... $site"
echo " requests ...... $number"
echo " concurrency ... $concurrency"
echo "------------------------------------------------------------------"

for run in $(seq 1 $runs); do
  ab -c$concurrency -n$number $site >> $log
  echo -e " run $run: \t $(grep "^Requests per second" $log | tail -1 | awk '{print$4}') reqs/sec"
done

avg=$(awk -v runs=$runs '/^Requests per second/ {sum+=$4; avg=sum/runs} END {print avg}' $log)

echo "------------------------------------------------------------------"
echo " average ....... $avg requests/sec"
echo
echo "see $log for details"