with acgi

    [ahoward@localhost ~]$ ab -n100 http://localhost/acgi/acgi-0.0.0/
    This is ApacheBench, Version 2.0.41-dev <$Revision: 1.141 $> apache-2.0
    Copyright (c) 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
    Copyright (c) 1998-2002 The Apache Software Foundation, http://www.apache.org/

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


    Server Software:        Apache/2.0.52
    Server Hostname:        localhost
    Server Port:            80

    Document Path:          /acgi/acgi-0.0.0/
    Document Length:        1120 bytes

    Concurrency Level:      1
    Time taken for tests:   1.348958 seconds
    Complete requests:      100
    Failed requests:        0
    Write errors:           0
    Total transferred:      137000 bytes
    HTML transferred:       112000 bytes
    Requests per second:    74.13 [#/sec] (mean)
    Time per request:       13.490 [ms] (mean)
    Time per request:       13.490 [ms] (mean, across all concurrent requests)
    Transfer rate:          98.59 [Kbytes/sec] received

    Connection Times (ms)
                  min  mean[+/-sd] median   max
    Connect:        0    0   0.0      0       0
    Processing:    11   12   3.5     12      32
    Waiting:        0   11   4.0     11      31
    Total:         11   12   3.5     12      32

    Percentage of the requests served within a certain time (ms)
      50%     12
      66%     12
      75%     12
      80%     12
      90%     15
      95%     23
      98%     24
      99%     32
     100%     32 (longest request)


without


  [ahoward@localhost ~]$ ab -n100 http://localhost/acgi/acgi-0.0.0/server.cgi
  This is ApacheBench, Version 2.0.41-dev <$Revision: 1.141 $> apache-2.0
  Copyright (c) 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
  Copyright (c) 1998-2002 The Apache Software Foundation, http://www.apache.org/

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


  Server Software:        Apache/2.0.52
  Server Hostname:        localhost
  Server Port:            80

  Document Path:          /acgi/acgi-0.0.0/server.cgi
  Document Length:        1133 bytes

  Concurrency Level:      1
  Time taken for tests:   12.793181 seconds
  Complete requests:      100
  Failed requests:        0
  Write errors:           0
  Total transferred:      138300 bytes
  HTML transferred:       113300 bytes
  Requests per second:    7.82 [#/sec] (mean)
  Time per request:       127.932 [ms] (mean)
  Time per request:       127.932 [ms] (mean, across all concurrent requests)
  Transfer rate:          10.55 [Kbytes/sec] received

  Connection Times (ms)
                min  mean[+/-sd] median   max
  Connect:        0    0   0.0      0       0
  Processing:   120  127  38.6    123     508
  Waiting:       67  124  39.2    121     506
  Total:        120  127  38.6    123     508

  Percentage of the requests served within a certain time (ms)
    50%    123
    66%    123
    75%    124
    80%    125
    90%    126
    95%    136
    98%    145
    99%    508
   100%    508 (longest request)


and that's only a few lines of pure ruby ;-)