Anon - no caching
Concurrency Level:      5
Time taken for tests:   127.193 seconds
Complete requests:      500
Failed requests:        395
   (Connect: 0, Length: 395, Exceptions: 0)
Broken pipe errors:     0
Total transferred:      12212187 bytes
HTML transferred:       11970687 bytes
Requests per second:    3.93 [#/sec] (mean)
Time per request:       1271.93 [ms] (mean)
Time per request:       254.39 [ms] (mean, across all concurrent requests)
Transfer rate:          96.01 [Kbytes/sec] received

===

Anon - normal page caching 
Concurrency Level:      5
Time taken for tests:   11.722 seconds
Complete requests:      500
Failed requests:        0
Broken pipe errors:     0
Total transferred:      12273200 bytes
HTML transferred:       12038802 bytes
Requests per second:    42.65 [#/sec] (mean)
Time per request:       117.22 [ms] (mean)
Time per request:       23.44 [ms] (mean, across all concurrent requests)
Transfer rate:          1047.02 [Kbytes/sec] received

====

AUTH USER (no caching available)
Concurrency Level:      5
Time taken for tests:   127.962 seconds
Complete requests:      500
Failed requests**:        320
   (Connect: 0, Length: 320, Exceptions: 0)
Broken pipe errors:     0
Total transferred:      12070714 bytes
HTML transferred:       11891214 bytes
Requests per second:    3.91 [#/sec] (mean)
Time per request:       1279.62 [ms] (mean)
Time per request:       255.92 [ms] (mean, across all concurrent requests)
Transfer rate:          94.33 [Kbytes/sec] received

**Failed requests indicate that the server, which did not have MySQL query caching
turned on per benchmarking standards, had a hard time keeping up with the load. This
illustrates just how hard Drupal has to work to serve un-cached, authenticated users.