去年就已经使用PHP7版本了,那时就说PHP7比老版本快了很多很多,在今年,又分别出了7.1和7.2版本,从 WordPress 4.9.3 开始,该版本修复了 4.9 以来的34个问题。包括外观定制器更改、小工具、可视编辑器和php 7.2兼容性的修复。做了一些对比后,最终决定将博客环境升级到PHP7.2版本。
WordPress用PHP几比较好呢?PHP7.1与7.2性能对比 - 小闻网

PHP7.1/7.2对比图:

汇总 bench.php bench.php + opcache micro_bench.php micro_bench.php + opcache
PHP7.1 1.3859 0.8133 5.6365 4.3600
PHP7.2 1.4514 0.7867 5.5840 3.7234

WordPress用PHP几比较好呢?PHP7.1与7.2性能对比 - 小闻网

压力测试:

未开启 opcache

# php7.1
Concurrency Level:      10
Time taken for tests:   8.696 seconds
Complete requests:      100
Failed requests:        0
Write errors:           0
Total transferred:      5215300 bytes
HTML transferred:       5189300 bytes
Requests per second:    11.50 [#/sec] (mean)
Time per request:       869.637 [ms] (mean)
Time per request:       86.964 [ms] (mean, across all concurrent requests)
Transfer rate:          585.65 [Kbytes/sec] received
# php7.2
Concurrency Level:      10
Time taken for tests:   8.528 seconds
Complete requests:      100
Failed requests:        0
Write errors:           0
Total transferred:      5215500 bytes
HTML transferred:       5189300 bytes
Requests per second:    11.73 [#/sec] (mean)
Time per request:       852.793 [ms] (mean)
Time per request:       85.279 [ms] (mean, across all concurrent requests)
Transfer rate:          597.24 [Kbytes/sec] received

可以看到在未开启opcache的情况下,性能非常糟糕,10个并发的情况下,每个请求的响应时间已经非常长了,没有必要继续增加并发数了。
开启 opcache 之后:

汇总 7.1 Requests per second (每秒) 7.1 Time per request (ms) 7.2 Requests per second (每秒) 7.2 Time per request (ms)
c10 n100 60.63 164.939 70.05 142.762
c20 n200 66.27 301.803 70.74 282.719
c30 n300 66.50 451.121 70.89 423.2
c40 n400 67.95 588.683 70.6 566.608

WordPress用PHP几比较好呢?PHP7.1与7.2性能对比 - 小闻网
在开启opcache 之后,相对之前未开启的情况性能简直天壤之别。相比之下php7.2在wordpress压测上,QPS 稳定在70+ 相对php7.1 增加不少。测试结果和配置参数以及服务器配置有关,仅供对比php7.1与7.2的性能。

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