apdex

Apdex Calculator

Application performance index (Apdex) calculator measures user satisfaction based on response time.

Installation

You can install the package using npm:

npm install apdex

Usage

import {Apdex} from 'apdex';

const app = new Apdex(1000); // set T to 1000ms
app.add(500); // add a response time of 500ms
app.add(2000); // add a response time of 2000ms
console.log(app.apdex); // 0.5

API

new Apdex(T, limit)

Creates a new instance of the Apdex calculator. T is the threshold response time in milliseconds, and limit is an optional parameter that limits the number of samples kept in the calculator.

add(value, error)

Adds a new sample to the calculator. value is the response time in milliseconds, and error is an optional boolean flag indicating whether the sample was an error.

flush()

Resets the calculator and removes all samples.

apdex

Returns the current Apdex score as a number between 0 and 1.