HTTP 负载生成器，以前名称为 rakyll / boom，是受到 Tarek Ziade 在 tarekziade / boom 的工具启示。因使用同样的名称会导致二进制名称冲突，进而导致混乱，因此更名为 Hey。
go get -u github.com/rakyll/hey
Usage: hey [options...] <url> Options: -n Number of requests to run. Default is 200. -c Number of requests to run concurrently. Total number of requests cannot be smaller than the concurrency level. Default is 50. -q Rate limit, in seconds (QPS). -o Output type. If none provided, a summary is printed. "csv" is the only supported alternative. Dumps the response metrics in comma-separated values format. -m HTTP method, one of GET, POST, PUT, DELETE, HEAD, OPTIONS. -H Custom HTTP header. You can specify as many as needed by repeating the flag. For example, -H "Accept: text/html" -H "Content-Type: application/xml" . -t Timeout for each request in seconds. Default is 20, use 0 for infinite. -A HTTP Accept header. -d HTTP request body. -D HTTP request body from file. For example, /home/user/file.txt or ./file.txt. -T Content-type, defaults to "text/html". -a Basic authentication, username:password. -x HTTP Proxy address as host:port. -h2 Enable HTTP/2. -host HTTP Host header. -disable-compression Disable compression. -disable-keepalive Disable keep-alive, prevents re-use of TCP connections between different HTTP requests. -cpus Number of used cpu cores. (default for current machine is 8 cores) -more Provides information on DNS lookup, dialup, request and response timings.