19k request/sec on dragonflybsd.

gistfile1.txt

% # source: https://github.com/aycanirican/hlibev/blob/master/Examples/ByteStringConcurrent.hs

% dmesg | grep GHz
CPU: Pentium(R) Dual-Core  CPU      E6300  @ 2.80GHz (2799.48-MHz K8-class CPU)

% curl http://192.168.1.100:5002/               
Hello, World!

% uname -a
DragonFly x 3.1-DEVELOPMENT DragonFly v3.1.0.299.g62f17-DEVELOPMENT #13: Mon Mar 12 12:39:42 EET 2012     root@x:/usr/obj/usr/src/sys/MYKERNEL  x86_64

% ab -n 100000 -c 100 http://192.168.1.100:5002/
This is ApacheBench, Version 2.0.41-dev <$Revision: 1.121.2.12 $> apache-2.0
Copyright (c) 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Copyright (c) 2006 The Apache Software Foundation, http://www.apache.org/

Benchmarking 192.168.1.100 (be patient)
Completed 10000 requests
Completed 20000 requests
Completed 30000 requests
Completed 40000 requests
Completed 50000 requests
Completed 60000 requests
Completed 70000 requests
Completed 80000 requests
Completed 90000 requests
Finished 100000 requests


Server Software:        
Server Hostname:        192.168.1.100
Server Port:            5002

Document Path:          /
Document Length:        13 bytes

Concurrency Level:      100
Time taken for tests:   5.128430 seconds
Complete requests:      100000
Failed requests:        0
Write errors:           0
Total transferred:      5201924 bytes
HTML transferred:       1300481 bytes
Requests per second:    19499.14 [#/sec] (mean)
Time per request:       5.128 [ms] (mean)
Time per request:       0.051 [ms] (mean, across all concurrent requests)
Transfer rate:          990.56 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    1   1.1      0       8
Processing:     2    3   0.8      3      10
Waiting:        1    2   0.8      2       8
Total:          2    4   1.6      4      12

Percentage of the requests served within a certain time (ms)
  50%      4
  66%      6
  75%      6
  80%      6
  90%      6
  95%      7
  98%      7
  99%      7
 100%     12 (longest request)