Compare different Faraday adapters against the parliament postcode to constituency API

http_client_comparison.rb

begin
  require 'bundler/inline'
rescue LoadError => e
  $stderr.puts 'Bundler version 1.10 or later is required. Please update your Bundler'
  raise e
end

gemfile(true) do
  source 'https://rubygems.org'

  gem 'faraday', '0.9.1'
  gem 'faraday_middleware', '0.10.0'

  gem 'net-http-persistent', '2.9.4'
  gem 'httpclient', '2.6.0.1'
  gem 'patron', '0.4.20'
  gem 'em-http-request', '1.1.2'
  gem 'em-synchrony', '1.0.4'
  gem 'excon', '0.45.4'

  gem 'benchmark-ips', '2.3.0'
end

require 'benchmark/ips'

API_HOST = 'http://data.parliament.uk'
API_ENDPOINT = '/membersdataplatform/services/mnis/Constituencies/CV66PS/'

def configure_faraday(conn, adapter)
  conn.response :follow_redirects
  conn.response :raise_error
  conn.adapter  adapter
end

def faraday_net_http
  @faraday_net_http ||= Faraday.new(API_HOST) { |conn| configure_faraday(conn, :net_http) }
end

def faraday_net_http_persistent
  @faraday_net_http_persistent ||= Faraday.new(API_HOST) { |conn| configure_faraday(conn, :net_http_persistent) }
end

def faraday_httpclient
  @faraday_httpclient ||= Faraday.new(API_HOST) { |conn| configure_faraday(conn, :httpclient) }
end

def faraday_patron
  @faraday_patron ||= Faraday.new(API_HOST) { |conn| configure_faraday(conn, :patron) }
end

def faraday_em_synchrony
  @faraday_em_synchrony ||= Faraday.new(API_HOST) { |conn| configure_faraday(conn, :em_synchrony) }
end

def faraday_excon
  @faraday_excon ||= Faraday.new(API_HOST) { |conn| configure_faraday(conn, :excon) }
end

Benchmark.ips do |x|
  x.report("Net::HTTP            ") { faraday_net_http.get(API_ENDPOINT) }
  x.report("Net::HTTP::Persistent") { faraday_net_http_persistent.get(API_ENDPOINT) }
  x.report("HTTPClient           ") { faraday_httpclient.get(API_ENDPOINT) }
  x.report("Patron               ") { faraday_patron.get(API_ENDPOINT) }
  x.report("EventMachine         ") { faraday_em_synchrony.get(API_ENDPOINT) }
  x.report("Excon                ") { faraday_excon.get(API_ENDPOINT) }
  x.compare!
end