A quick and dirty url benchmarking script in Ruby

When trying to get to the bottom of a mis-behaving server issue, we needed to compare the time taken to serve URLs on different domains. So I knocked together a quick script to request urls a bunch of times and give us the average. Posting it here and also as a gist in case it saves someone some time.

#!/usr/bin/env ruby

# Used to perform multiple requests of urls for benchmarking
#
# @example
#   # Requests the url 3 times outputting times for each
#   ./benchmark_url 3 http://my.url.com
#   ruby benchmark_url 3 http://my.url.com
#
#   # Requests each url 5 times outputting times for each
#   ./benchmark_url 5 http://my.url.com http://my.url2.com
#   ruby benchmark_url 5 http://my.url.com http://my.url2.com


require 'benchmark'
require 'net/http'
require 'uri'

numtimes = ARGV.shift
urls = ARGV

urls.each do |u|
  total = 0
  puts u
  puts '=' * u.length
  (1..numtimes.to_i).each do |n|
    time = Benchmark.realtime {Net::HTTP.get_response(URI.parse(u))}
    puts "#{u} - #{n} : #{time}s"
    total += time
  end
  puts '=' * u.length
  puts "Average for #{u} : #{(total / numtimes.to_i).round(4)}s"
  puts "\n"
end