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Obsolete:GCC benchmarking

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Here are some benchmark results for PHP compiled with GCC 4.0.1 versus GCC 3.2.2. Results are typically stable to about 1%.

Benchmark script - Test input - NFC test input

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Old build: PHP 4.3.11 compiled with gcc 3.2.2 -O2

Tight loop: 0.514458203316 us
doBlockLevels: 34.7585201263 ms
doTableStuff: 4.51628994942 ms
String concatenation x1000: 0.884188294411 ms
NFC: 130.836920738 ms
preg_replace: 7.17005205154 ms

PHP 4.4.0 compiled with gcc 3.2.2 -O3

Tight loop: 0.529537200928 us
doBlockLevels: 36.1865615845 ms
doTableStuff: 4.6063349247 ms
String concatenation x1000: 0.874975395203 ms
NFC: 130.677857399 ms
preg_replace: 9.54832410812 ms

PHP 4.4.0 compiled with gcc 4.0.1 -O3

Tight loop: 0.462446498871 us
doBlockLevels: 36.2876796722 ms
doTableStuff: 4.38923716545 ms
String concatenation x1000: 0.816931509972 ms
NFC: 130.018181801 ms
preg_replace: 7.79179096222 ms

PHP 4.4.0 gcc4 -O3 -march=pentium4

Tight loop: 0.494507002831 us
doBlockLevels: 36.3027191162 ms
doTableStuff: 4.4699139595 ms
String concatenation x1000: 0.817039394379 ms
NFC: 129.29461956 ms
preg_replace: 8.51239395142 ms

PHP 4.4.0 gcc4 -O3 -march=pentium4 profile-guided

Profiling data was mainly from refreshLinks.php, not from the benchmark itself.

Tight loop: 0.478229784966 us
doBlockLevels: 34.7643613815 ms
doTableStuff: 4.50187897682 ms
String concatenation x1000: 0.807020902634 ms
NFC: 126.532878876 ms
preg_replace: 7.74664902687 ms

PHP 4.4.0 gcc4 -O2

Tight loop: 0.502064394951 us
doBlockLevels: 36.7405986786 ms
doTableStuff: 4.64641189575 ms
String concatenation x1000: 0.832908701897 ms
NFC: 152.706279755 ms
preg_replace: 8.65598201752 ms

PHP 4.4.0 gcc4 -O3 profile-guided

preg_replace: 7.99713206291 ms

ab PHP 4.3.11

Note that the difference between the first and second runs is mostly at the slow end of the histogram -- the median is the same.

First run

[0411][tstarling@hypatia:/home/wikipedia/src/php/php-4.4.0-gcc4]$ ab -n1000 -Xlocalhost:80 http://en.wikipedia.org/wiki/Special:Specialpages
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 en.wikipedia.org [through localhost:80] (be patient)
Completed 100 requests
Completed 200 requests
Completed 300 requests
Completed 400 requests
Completed 500 requests
Completed 600 requests
Completed 700 requests
Completed 800 requests
Completed 900 requests
Finished 1000 requests


Server Software:        Apache
Server Hostname:        en.wikipedia.org
Server Port:            80

Document Path:          /wiki/Special:Specialpages
Document Length:        9904 bytes

Concurrency Level:      1
Time taken for tests:   91.826427 seconds
Complete requests:      1000
Failed requests:        0
Write errors:           0
Total transferred:      10178000 bytes
HTML transferred:       9904000 bytes
Requests per second:    10.89 [#/sec] (mean)
Time per request:       91.826 [ms] (mean)
Time per request:       91.826 [ms] (mean, across all concurrent requests)
Transfer rate:          108.24 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    0   0.0      0       0
Processing:    76   91  85.7     83    2265
Waiting:       71   86  85.8     78    2264
Total:         76   91  85.7     83    2265

Percentage of the requests served within a certain time (ms)
  50%     83
  66%     84
  75%     86
  80%     87
  90%     91
  95%     97
  98%    148
  99%    271
 100%   2265 (longest request)

Second run

[0413][tstarling@hypatia:/home/wikipedia/src/php/php-4.4.0-gcc4]$ ab -n1000 -Xlocalhost:80 http://en.wikipedia.org/wiki/Special:Specialpages
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 en.wikipedia.org [through localhost:80] (be patient)
Completed 100 requests
Completed 200 requests
Completed 300 requests
Completed 400 requests
Completed 500 requests
Completed 600 requests
Completed 700 requests
Completed 800 requests
Completed 900 requests
Finished 1000 requests


Server Software:        Apache
Server Hostname:        en.wikipedia.org
Server Port:            80

Document Path:          /wiki/Special:Specialpages
Document Length:        9904 bytes

Concurrency Level:      1
Time taken for tests:   87.275028 seconds
Complete requests:      1000
Failed requests:        0
Write errors:           0
Total transferred:      10178000 bytes
HTML transferred:       9904000 bytes
Requests per second:    11.46 [#/sec] (mean)
Time per request:       87.275 [ms] (mean)
Time per request:       87.275 [ms] (mean, across all concurrent requests)
Transfer rate:          113.88 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    0   0.0      0       0
Processing:    76   86  20.9     83     428
Waiting:       72   81  21.1     78     424
Total:         76   86  20.9     83     428

Percentage of the requests served within a certain time (ms)
  50%     83
  66%     84
  75%     86
  80%     87
  90%     91
  95%     97
  98%    132
  99%    190
 100%    428 (longest request)

ab PHP 4.4.0

First run

[0434][tstarling@hypatia:/home/wikipedia/src/turck/turck-for-php440]$ ab -n1000 -Xlocalhost:80 http://en.wikipedia.org/wiki/Special:Specialpages
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 en.wikipedia.org [through localhost:80] (be patient)
Completed 100 requests
Completed 200 requests
Completed 300 requests
Completed 400 requests
Completed 500 requests
Completed 600 requests
Completed 700 requests
Completed 800 requests
Completed 900 requests
Finished 1000 requests


Server Software:        Apache
Server Hostname:        en.wikipedia.org
Server Port:            80

Document Path:          /wiki/Special:Specialpages
Document Length:        9904 bytes

Concurrency Level:      1
Time taken for tests:   83.706322 seconds
Complete requests:      1000
Failed requests:        0
Write errors:           0
Total transferred:      10177000 bytes
HTML transferred:       9904000 bytes
Requests per second:    11.95 [#/sec] (mean)
Time per request:       83.706 [ms] (mean)
Time per request:       83.706 [ms] (mean, across all concurrent requests)
Transfer rate:          118.72 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    0   0.0      0       0
Processing:    72   83  21.6     79     344
Waiting:       68   78  21.6     75     337
Total:         72   83  21.6     79     344

Percentage of the requests served within a certain time (ms)
  50%     79
  66%     81
  75%     82
  80%     83
  90%     87
  95%     91
  98%    113
  99%    191
 100%    344 (longest request)

Second run

[0436][tstarling@hypatia:/home/wikipedia/src/turck/turck-for-php440]$ ab -n1000 -Xlocalhost:80 http://en.wikipedia.org/wiki/Special:Specialpages
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 en.wikipedia.org [through localhost:80] (be patient)
Completed 100 requests
Completed 200 requests
Completed 300 requests
Completed 400 requests
Completed 500 requests
Completed 600 requests
Completed 700 requests
Completed 800 requests
Completed 900 requests
Finished 1000 requests


Server Software:        Apache
Server Hostname:        en.wikipedia.org
Server Port:            80

Document Path:          /wiki/Special:Specialpages
Document Length:        9904 bytes

Concurrency Level:      1
Time taken for tests:   86.94135 seconds
Complete requests:      1000
Failed requests:        0
Write errors:           0
Total transferred:      10177000 bytes
HTML transferred:       9904000 bytes
Requests per second:    11.62 [#/sec] (mean)
Time per request:       86.094 [ms] (mean)
Time per request:       86.094 [ms] (mean, across all concurrent requests)
Transfer rate:          115.43 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    0   0.0      0       0
Processing:    73   85  65.7     79    2079
Waiting:       69   80  65.8     75    2078
Total:         73   85  65.7     79    2079

Percentage of the requests served within a certain time (ms)
  50%     79
  66%     81
  75%     83
  80%     84
  90%     89
  95%     98
  98%    143
  99%    176
 100%   2079 (longest request)

So the median dropped from 83ms to 79ms, an improvement of 5%. ?