hey is a tiny program that sends some load to a web application.

hey was originally called boom and was influenced from Tarek Ziade's tool at tarekziade/boom. Using the same name was a mistake as it resulted in cases where binary name conflicts created confusion. To preserve the name for its original owner, we renamed this project to hey.

Building

You can build the hey binaries using make

make

This will run all the go build commands under the release section of the Makefile. The resulting binaries will be under the bin directory.

Installation

Download the binary from the following links:

• Linux 64-bit x86: https://eldada.jfrog.io/artifactory/tools/hey/hey_linux_amd64
• Linux 64-bit ARM: https://eldada.jfrog.io/artifactory/tools/hey/hey_linux_arm64
• Mac 64-bit: https://eldada.jfrog.io/artifactory/tools/hey/hey_darwin_amd64
• Windows 64-bit: https://eldada.jfrog.io/artifactory/tools/hey/hey_windows_amd64

Package Managers

macOS:

• Homebrew users can use brew install hey.

Usage

hey runs provided number of requests in the provided concurrency level and prints stats.

It also supports HTTP2 endpoints.

Usage: hey [options...] <url>

Options:
  -n  Number of requests to run. Default is 200.
  -c  Number of workers to run concurrently. Total number of requests cannot
      be smaller than the concurrency level. Default is 50.
  -q  Rate limit, in queries per second (QPS) per worker. Default is no rate limit.
  -z  Duration of application to send requests. When duration is reached,
      application stops and exits. If duration is specified, n is ignored.
      Examples: -z 10s -z 3m.
  -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.
  -disable-redirects    Disable following of HTTP redirects
  -cpus                 Number of used cpu cores.
                        (default for current machine is 8 cores)

Previously known as github.com/rakyll/boom.