server.rb

require 'sinatra/base'

class GetServer < Sinatra::Base
  set :logging, nil
  get '/' do
    puts "count: #{params["request_number"]}"
  end
end

typhoeus_requests.rb

require 'typhoeus'
require 'net/http'

ATTEMPTS = 300_000
hydra = Typhoeus::Hydra.new

ATTEMPTS.times do |i|
  request = Typhoeus::Request.new(
    '127.0.0.1:4567',
    method: :get,
    params: { request_number: i },
    connecttimeout: 5,
    timeout: 5
  )

  request.on_complete do |r|
    if r.timed_out?
      puts "#{i} timed out at #{Time.now}"
    end
  end

  hydra.queue request
end

hydra.run