EventMachine hello world...

event_machine_hellow_world.rb

require 'rubygems'
require 'eventmachine'
require 'evma_httpserver'
 
class Handler  < EventMachine::Connection
  include EventMachine::HttpServer
 
  def process_http_request
    resp = EventMachine::DelegatedHttpResponse.new( self )
 
    #sleep 2 # Simulate a long running request
 
    resp.status = 200
    resp.content = "Hi!"
    resp.send_response
  end
end
 
EventMachine::run {
  EventMachine.epoll
  EventMachine::start_server("0.0.0.0", 3000, Handler)
  puts "Listening..."
}



tim@li164-209:~$ ab -n 50000 -c 1000 http://0.0.0.0:3000/
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 0.0.0.0 (be patient)
Completed 5000 requests
Completed 10000 requests
Completed 15000 requests
Completed 20000 requests
Completed 25000 requests
Completed 30000 requests
Completed 35000 requests
Completed 40000 requests
Completed 45000 requests
Completed 50000 requests
Finished 50000 requests


Server Software:        
Server Hostname:        0.0.0.0
Server Port:            3000

Document Path:          /
Document Length:        3 bytes

Concurrency Level:      1000
Time taken for tests:   7.173 seconds
Complete requests:      50000
Failed requests:        0
Write errors:           0
Total transferred:      2100504 bytes
HTML transferred:       150036 bytes
Requests per second:    6971.03 [#/sec] (mean)
Time per request:       143.451 [ms] (mean)
Time per request:       0.143 [ms] (mean, across all concurrent requests)
Transfer rate:          285.99 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0   96 501.2      9    3042
Processing:     8   20  19.4     15     653
Waiting:        5   16  16.9     12     649
Total:         17  116 506.0     24    3653

Percentage of the requests served within a certain time (ms)
  50%     24
  66%     26
  75%     28
  80%     34
  90%     50
  95%     92
  98%   3052
  99%   3062
 100%   3653 (longest request)
tim@li164-209:~$