Concurrency Level: 20
Time taken for tests: 97.526 seconds
Complete requests: 1000
Failed requests: 0
Write errors: 0
Total transferred: 36339832 bytes
HTML transferred: 35965084 bytes
Requests per second: 10.25 [#/sec] (mean)
Time per request: 1950.518 [ms] (mean)
Time per request: 97.526 [ms] (mean, across all concurrent requests)
Transfer rate: 363.88 [Kbytes/sec] received
查看手册上的解释是：
The first value is calculated with the formula concurrency *timetaken * 1000 / done
while the second value is calculated with the formula timetaken * 1000 / done
第一个里面:(并发*消耗的时间*1000)/done 这里done是什么意思
怎么更好的理解这两个值。
ab有一个-c n参数，就是第一行的Concurrency Level，可以让ab创建n个并发连接进行测试。
第一个Time per request代表每个链接上单个请求的平均响应时间
第二个Time per request所有链接合计后单个请求的平均响应时间
它们之间的关系是：Tpr1=Tpr2*n
done 就是 Complete requests的数值， 代表完成的请求数