heyo

heyo sends some variable load to a web application.

⚠ This is WIP: You should not make assertions or assumptions based on use of this tool. Also, ignore the reports as changes to achieve the variability broke them.

It is nearly a clone of hey with code added to segment the duration into smaller windows, each with normally distributed numbers of workers around the specified level. At the moment it accomplishes strictly this, even at the expense of correctness in the post run reports which are fully functional in hey.

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.

Installation

• Linux 64-bit: https://hey-release.s3.us-east-2.amazonaws.com/hey_linux_amd64
• Mac 64-bit: https://hey-release.s3.us-east-2.amazonaws.com/hey_darwin_amd64
• Windows 64-bit: https://hey-release.s3.us-east-2.amazonaws.com/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.