Fun with async webserver

ab-test

-> ab -c 10 -n 10 http://localhost:3000/timer
This is ApacheBench, Version 2.3 <$Revision: 655654 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking localhost (be patient).....done


Server Software:        thin
Server Hostname:        localhost
Server Port:            3000

Document Path:          /timer
Document Length:        5 bytes

Concurrency Level:      10
* => Time taken for tests:   2.038 seconds
Complete requests:      10
Failed requests:        0
Write errors:           0
Total transferred:      1230 bytes
HTML transferred:       50 bytes
Requests per second:    4.91 [#/sec] (mean)
Time per request:       2037.824 [ms] (mean)
Time per request:       203.782 [ms] (mean, across all concurrent requests)
Transfer rate:          0.59 [Kbytes/sec] received

config.rb

# ruby 1.9
# gem install thin sinatra rack-fiber_pool
# 
# thin -R config.ru start

require 'fiber'
require 'rack/fiber_pool'
use Rack::FiberPool

require 'sinatra'

Sinatra::Base.set(:run, false)
Sinatra::Base.set(:env, :production)
puts "Starting"
require './timer'
run Sinatra::Application

timer.rb

require 'sinatra'

get '/timer' do
  f = Fiber.current
  EventMachine::add_timer(2) { f.resume }
  # give control
  Fiber.yield
  'ended'
end