based on epoll edge trigger, nonblocking IO, IO & worker thread pool

• single thread echo server (v1.0.0)
• single thread http(get) server (v1.0.0)
• eventloop pool echo server (v2.0.0)
• eventloop pool http server (v2.0.0)
• eventloop pool(io thread) & worker thread Pool echo server (v3.0.0)
• eventloop pool(io thread) & worker thread Pool http server (v3.0.0)

$ make echoserver

--------------another terminal window--------------------
$ telnet 127.0.0.1 8088

• support method: GET
• support Connection: keep-alive
• 为了让webbench正常收到FIN，当httpserver在短连接时，发送完完整的response就close掉连接

$ make httpserver

need clang-format

$ make format

WebBench
Web性能压力测试之Webbench使用详解

$ make httpserver

--------------another terminal window--------------------
$ webbench -c 20 -t 30 --get -1 http://127.0.0.1:8088/index.html

$ webbench -c 20 -t 30 --get -1 http://127.0.0.1:8088/webbench

• HTTP parser state machine 直到session存储整个完整的请求头才解析回复
• 单线程->iothread pool + 单工作线程-> iothread pool + worker thread pool 发现性能吞吐量越来越低(环境：2核虚拟机ubuntu20.04)

chenshuo(muduo)
linyacool(WebServer)
chenshuaihao(NetServer)
jayice(NetServre)
《linux多线程服务端编程》
《Linux高性能服务器编程》