对于http服务器压力测试工具，类似于ab工具，基于Golang编写的

1、https://github.com/adjust/go-wrk

go get -U github.com/adjust/go-wrk
会自动build

2、https://github.com/wg/wrk

git clone https://github.com/wg/wrk
cd wrk
make
./wrk --help

Usage: wrk <options> <url>
  Options:
    -c, --connections <N>  Connections to keep open
    -d, --duration    <T>  Duration of test
    -t, --threads     <N>  Number of threads to use

    -s, --script      <S>  Load Lua script file
    -H, --header      <H>  Add header to request
        --latency          Print latency statistics
        --timeout     <T>  Socket/request timeout
    -v, --version          Print version details

  Numeric arguments may include a SI unit (1k, 1M, 1G)
  Time arguments may include a time unit (2s, 2m, 2h)

3、示例

wrk -t10 -c100 -d10s -T5s --latency http://localhost:6060

-t：需要模拟的线程数
-c：需要模拟的连接数
-d：测试的持续时间
--timeout 或 -T：超时的时间 
--latency：显示延迟统计
-s 或 --script:      lua脚本,使用方法往下看
-H, --header:      添加http header, 比如. "User-Agent: wrk"

输出结果

Running 10s test @ http://localhost:6060
  10 threads and 100 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev(正负一个标准差占比)
    Latency     4.68ms    1.18ms  27.85ms   86.17%
    Req/Sec     2.14k   148.28     3.29k    78.02%
  Latency Distribution
     50%    4.53ms
     75%    4.93ms
     90%    5.58ms
     99%    9.48ms
  215164 requests in 10.08s, 29.55MB read
Requests/sec:  21355.38
Transfer/sec:      2.93MB

对于一些复杂的请求则需要借助于LUA脚本

lua脚本为：body中是参数 ,headers为请求头

request = function()
   headers = {Connection= "keep-alive"}
   body = "name=中文"
   return wrk.format("POST",path,headers,body)
end

wrk -t10 -c100 -d10s -T5s --latency -s testpost.lua  http://localhost:6060/testpost

Running 10s test @ http://localhost:6060/testpost
  10 threads and 100 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency     5.45ms    3.04ms  69.77ms   90.50%
    Req/Sec     1.89k   260.74     3.20k    82.10%
  Latency Distribution
     50%    4.88ms
     75%    5.55ms
     90%    7.19ms
     99%   17.54ms
  189108 requests in 10.05s, 26.51MB read
Requests/sec:  18816.19
Transfer/sec:      2.64MB