whitelisting_benchmark.rb

require 'capybara'
require 'capybara/poltergeist'

def wait_for_ajax(session)
  Timeout.timeout(Capybara.default_wait_time) do
    return if session.evaluate_script('jQuery.active').blank?
    loop until session.evaluate_script('jQuery.active').zero?
  end
end
 
def access(url, load_image: true, blacklist: [], whitelist: [])
  Capybara.register_driver(:poltergeist) do |app|
    Capybara::Poltergeist::Driver.new(app, {
      js_errors: false,
      phantomjs_options: ["--load-images=#{load_image ? 'yes' : 'no'}"]
    })
  end
  s = Capybara::Session.new(:poltergeist)
  s.driver.browser.url_blacklist = blacklist if blacklist.present?
  s.driver.browser.url_whitelist = whitelist if whitelist.present?
  s.visit(url)
  Scraping.wait_for_ajax(s)
  s
end

params = [true, false].product([[], %w[www.facebook.com]], [[], %w[www.jleague.jp]])
params.each do |load_image, blacklist, whitelist|
  next if blacklist.present? and whitelist.present?
  t = 10.times.map do
    sleep(3)
    Benchmark.realtime do
      access('http://www.jleague.jp/match/j1/2016/022801/live/',
             load_image: load_image,
             blacklist: blacklist,
             whitelist: whitelist)
    end
  end
  puts "#{load_image.!}, #{blacklist.inspect}, #{whitelist.inspect}, #{(t.sum / t.length).round(2)}s"
end