使用ab做性能测试

apt install -y apache2-utils

ab -t 5 -c 1000 "http://127.0.0.1:8000/dynamic_hello?hello=yzh"

This is ApacheBench, Version 2.3 <$Revision: 1807734 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking 127.0.0.1 (be patient)
Finished 1740 requests


Server Software:        
Server Hostname:        127.0.0.1
Server Port:            8000

Document Path:          /dynamic_hello?hello=yzh
Document Length:        17 bytes

Concurrency Level:      1000
Time taken for tests:   5.261 seconds
Complete requests:      1740 // 请求数
Failed requests:        0  // 失败数
Total transferred:      196880 bytes
HTML transferred:       31280 bytes
Requests per second:    330.76 [#/sec] (mean) // QPS
Time per request:       3023.304 [ms] (mean)  // 用户感受的平均响应时间
Time per request:       3.023 [ms] (mean, across all concurrent requests)  // 服务端每个请求的处理时间
Transfer rate:          36.55 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0  279 452.8      2    1034
Processing:   302  802 402.0    866    4229
Waiting:      280  695 372.7    731    4081
Total:        304 1082 732.1    869    5245

Percentage of the requests served within a certain time (ms)
  50%    869
  66%    909
  75%   1583
  80%   1939
  90%   2009
  95%   2638
  98%   2647
  99%   2649
 100%   5245 (longest request)