目前我安装的 Homestead 虚拟机版本是 2.1.8：
该版本 Homestead 上预装的 PHP 版本是 5.6.15：
我们使用 ab 命令（Apache 提供的性能测试工具）在该版本中测试 Laravel 应用（以目前正在讲的使用Laravel开发的博客应用为例）性能，我们模拟 10000 次请求，100 个并发进行压力测试：
ab -n 10000 -c 100 http://blog.app/
运行结果如下：
This is ApacheBench,Version 2.3 Copyright 1996 Adam Twiss,Zeus Technology Ltd,http://www.zeustech.net/ Licensed to The Apache Software Foundation,http://www.apache.org/ Benchmarking blog.app (be patient) Completed 1000 requests Completed 2000 requests Completed 3000 requests Completed 4000 requests Completed 5000 requests Completed 6000 requests Completed 7000 requests Completed 8000 requests Completed 9000 requests Completed 10000 requests Finished 10000 requests Server Software: Nginx/1.8.0 Server Hostname: blog.app Server Port: 80 Document Path: / Document Length: 324 bytes Concurrency Level: 100 Time taken for tests: 69.354 seconds Complete requests: 10000 Failed requests: 0 Total transferred: 19851388 bytes HTML transferred: 10230000 bytes Requests per second: 144.19 [#/sec] (mean) Time per request: 693.545 [ms] (mean) Time per request: 6.935 [ms] (mean,across all concurrent requests) Transfer rate: 279.52 [Kbytes/sec] received Connection Times (ms) min mean[+/-sd] median max Connect: 0 0 0.2 0 3 Processing: 17 684 319.1 588 2720 Waiting: 17 684 319.1 588 2720 Total: 20 684 319.1 588 2720 Percentage of the requests served within a certain time (ms) 50% 588 66% 695 75% 842 80% 933 90% 1155 95% 1321 98% 1545 99% 1813 100% 2720 (longest request)
再次访问就OK了，好了我们继续使用同样的 ab 命令进行压力测试：
ab -n 10000 -c 100 http://blog.app/
运行结果如下：
This is ApacheBench,Version 2.3 Copyright 1996 Adam Twiss,http://www.zeustech.net/ Licensed to The Apache Software Foundation,http://www.apache.org/ Benchmarking blog.app (be patient) Completed 1000 requests Completed 2000 requests Completed 3000 requests Completed 4000 requests Completed 5000 requests Completed 6000 requests Completed 7000 requests Completed 8000 requests Completed 9000 requests Completed 10000 requests Finished 10000 requests Server Software: Nginx/1.8.0 Server Hostname: blog.app Server Port: 80 Document Path: / Document Length: 324 bytes Concurrency Level: 100 Time taken for tests: 45.032 seconds Complete requests: 10000 Failed requests: 0 Total transferred: 20101202 bytes HTML transferred: 10230000 bytes Requests per second: 222.06 [#/sec] (mean) Time per request: 450.319 [ms] (mean) Time per request: 4.503 [ms] (mean,across all concurrent requests) Transfer rate: 435.91 [Kbytes/sec] received Connection Times (ms) min mean[+/-sd] median max Connect: 0 0 0.2 0 4 Processing: 11 443 252.8 379 1978 Waiting: 11 443 252.8 379 1978 Total: 15 443 252.8 379 1978 Percentage of the requests served within a certain time (ms) 50% 379 66% 517 75% 590 80% 631 90% 795 95% 938 98% 1060 99% 1229 100% 1978 (longest request)
