Introduction

The first-response-time.js script can be used to collect the first response time also known as the time to first request.

The script executes a command and makes requests to a specific URL in 100 ms intervals until it receives the 200 HTTP status code with a response body.

The script finally prints out the duration between the command execution and the time it received the 200 status.

Installation

1. Install Node.js with npm
1. Run npm i -g first-response-time

Usage

``sh
first-response-time "" [--ping ]
`

a correctly escaped system command.
request url.

(optional) --ping (default: 100 milliseconds)

Examples

`sh
first-response-time "java -jar uber-jar.jar" http://localhost:8080/hello
`

`sh
first-response-time "node script.js" http://localhost:8080/hello --ping 20
``