对于limit_req_zone，请求静态资源和动态资源压测差别很大啊

Question

nginx配置大概是

limit_req_zone $binary_remote_addr zone=req_zone:1m rate=1r/s;
server {
    listen       80;
    server_name  localhost;
    access_log  /var/log/nginx/host.access.log  main;
    root   /usr/share/nginx/html;
    location / {
        root   /usr/share/nginx/html;
        index  index.html index.htm;
        limit_req zone=req_zone;
    }
   }

p.php是phpinfo

ab -n 20 -c 20 http://192.168.1.251/p.php

结果是

Concurrency Level:      20

Time taken for tests:   0.071 seconds

Complete requests:      20

Failed requests:        3

   (Connect: 0, Receive: 0, Length: 3, Exceptions: 0)

Write errors:           0

Total transferred:      1645517 bytes

HTML transferred:       1642257 bytes

Requests per second:    282.81 [#/sec] (mean)

Time per request:       70.719 [ms] (mean)

Time per request:       3.536 [ms] (mean, across all concurrent requests)

Transfer rate:          22723.03 [Kbytes/sec] received

而压测静态文件结果是

ab -n 20 -c 20 http://192.168.1.251/1.html

Concurrency Level:      20

Time taken for tests:   0.022 seconds

Complete requests:      20

Failed requests:        19

   (Connect: 0, Receive: 0, Length: 19, Exceptions: 0)

Write errors:           0

Non-2xx responses:      19

Total transferred:      8843 bytes

HTML transferred:       4928 bytes

Requests per second:    892.38 [#/sec] (mean)

Time per request:       22.412 [ms] (mean)

Time per request:       1.121 [ms] (mean, across all concurrent requests)

Transfer rate:          385.32 [Kbytes/sec] received

为什么差距那么大呢？