php - 如何在 PHP 中获得更长的编译时间

Question

我想知道如何编写需要更长编译时间的 PHP 脚本？

我想这样做以测试OPCache 扩展的工作原理。

后期编辑：当 PHP 脚本加载时，代码被编译成字节码，这个字节码将被 CPU 解释。编译过程通常需要几毫秒，但我需要让这个时间非常长，以测试 PHP 5.5 的 OPCache 扩展。这个扩展应该缓存脚本字节码，这样它就不需要再次编译脚本。

Answer 1

正如@PaulCrovella 在评论中所说，我需要的是 ApacheBench。

ab http://localhost/index.php通过在包含大约 600.000 行代码的脚本上使用该命令，结果是：

在第一次基准测试中：

Server Software:        Apache/2.4.9
Server Hostname:        localhost
Server Port:            80

Document Path:          /index.php
Document Length:        4927 bytes

Concurrency Level:      1
Time taken for tests:   0.944 seconds
Complete requests:      1
Failed requests:        0
Total transferred:      5116 bytes
HTML transferred:       4927 bytes
Requests per second:    1.06 [#/sec] (mean)
Time per request:       944.054 [ms] (mean)
Time per request:       944.054 [ms] (mean, across all concurrent requests)
Transfer rate:          5.29 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    0   0.0      0       0
Processing:   944  944   0.0    944     944
Waiting:      939  939   0.0    939     939
Total:        944  944   0.0    944     944

在第二个基准测试中：

Server Software:        Apache/2.4.9
Server Hostname:        localhost
Server Port:            80

Document Path:          /index.php
Document Length:        4927 bytes

Concurrency Level:      1
Time taken for tests:   0.047 seconds
Complete requests:      1
Failed requests:        0
Total transferred:      5116 bytes
HTML transferred:       4927 bytes
Requests per second:    21.28 [#/sec] (mean)
Time per request:       47.003 [ms] (mean)
Time per request:       47.003 [ms] (mean, across all concurrent requests)
Transfer rate:          106.29 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    0   0.0      0       0
Processing:    47   47   0.0     47      47
Waiting:       43   43   0.0     43      43
Total:         47   47   0.0     47      47