基于 GoLang 的精简版 TCP 测速程序，原地址 https://github.com/jspiegler/goperf
go get github.com/lzxz1234/iperf/iperf
命令行直接调用 iperf，可选参数如下：
| Flag | Parameter Type | Description |
|---|---|---|
| -Mbps | integer | -Mbps nnn: for UDP connections, transmit at Mbps (M=1000000) |
| -c | string | -c host:port: run as client, making connection to IP address host, port number port |
| -nb | integer | -nb nnn: send/receive nnn bytes, then quit (default: no byte limit) |
| -ns | integer | -ns nnn: send/receive for nnn seconds, then quit (default: no time limit) |
| -rate | string | -rate nnn[X]: transmit at nnn bps, with an optional multiplier X (K, M, or G) |
| -s | string | -s N, for server operation, listen on port N (all interfaces) |
| -scroll | boolean | -scroll: make output scroll (default: no scroll) |
| -ts | boolean | -ts: display timestamp on each line of output |
| -v | boolean | -v: display version and quit |
服务端执行 iperf -s 8800
客户端执行 iperf -c 127.0.0.1:8800