PHP開啓opcache提高代碼性能

配置指令以下：

[opcache]
zend_extension=opcache.so
opcache.enable_cli=1
;共享內存大小, 這個根據大家的需求可調
opcache.memory_consumption=256      
;interned string的內存大小, 也可調
opcache.interned_strings_buffer=8
;最大緩存的文件數目
opcache.max_accelerated_files=4000
;60s檢查一次文件更新
opcache.revalidate_freq=60
;打開快速關閉, 打開這個在PHP Request Shutdown的時候  會收內存的速度會提升
opcache.fast_shutdown=1
;不保存文件/函數的註釋
opcache.save_comments=0

實際性能對比：

下面是實際測試中沒有開啓opcache的數據：

[root@localhost ~]# ab -n 10000 -c 200 "http://112.126.69.14/main.php?a=Role&m=createRole"
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 112.126.69.14 (be patient)
Completed 1000 requests
Completed 2000 requests
Completed 3000 requests
Completed 4000 requests
Completed 5000 requests
Completed 6000 requests
Completed 7000 requests
Completed 8000 requests
Completed 9000 requests
Completed 10000 requests
Finished 10000 requests


Server Software:        openresty/1.7.2.1
Server Hostname:        112.126.69.14
Server Port:            80

Document Path:          /main.php?a=Role&m=createRole
Document Length:        2 bytes

Concurrency Level:      200
Time taken for tests:   26.061 seconds
Complete requests:      10000
Failed requests:        20
   (Connect: 0, Receive: 0, Length: 20, Exceptions: 0)
Write errors:           0
Non-2xx responses:      20
Total transferred:      1713580 bytes
HTML transferred:       23520 bytes
Requests per second:    383.72 [#/sec] (mean)
Time per request:       521.216 [ms] (mean)
Time per request:       2.606 [ms] (mean, across all concurrent requests)
Transfer rate:          64.21 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        2    3   3.2      2      60
Processing:    17  461 905.0    219   16496
Waiting:       17  461 904.9    219   16496
Total:         21  464 905.0    222   16502

Percentage of the requests served within a certain time (ms)
  50%    222
  66%    271
  75%    369
  80%    412
  90%    805
  95%   1248
  98%   2597
  99%   3489
 100%  16502 (longest request)

開啓以後的數據：

[root@localhost ~]# ab -n 10000 -c 200 "http://112.126.69.14/main.php?a=Role&m=createRole"
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 112.126.69.14 (be patient)
Completed 1000 requests
Completed 2000 requests
Completed 3000 requests
Completed 4000 requests
Completed 5000 requests
Completed 6000 requests
Completed 7000 requests
Completed 8000 requests
Completed 9000 requests
Completed 10000 requests
Finished 10000 requests


Server Software:        openresty/1.7.2.1
Server Hostname:        112.126.69.14
Server Port:            80

Document Path:          /main.php?a=Role&m=createRole
Document Length:        2 bytes

Concurrency Level:      200
Time taken for tests:   14.237 seconds
Complete requests:      10000
Failed requests:        0
Write errors:           0
Total transferred:      1711710 bytes
HTML transferred:       20020 bytes
Requests per second:    702.40 [#/sec] (mean)
Time per request:       284.739 [ms] (mean)
Time per request:       1.424 [ms] (mean, across all concurrent requests)
Transfer rate:          117.41 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        2   66 272.6      2    3005
Processing:     4  176 666.4      6    9026
Waiting:        4  163 642.8      6    9026
Total:          6  242 745.7      9   10028

Percentage of the requests served within a certain time (ms)
  50%      9
  66%     14
  75%     99
  80%    122
  90%   1006
  95%   1476
  98%   2853
  99%   3543
 100%  10028 (longest request)