Why Postman supports non-functional testing - The Real Reasons

The Big Idea

What if you could catch slow app responses before your users even notice?

The Scenario

Imagine you have to check how fast a website or app responds every single time a change is made. Doing this by clicking around and timing it yourself is tiring and often inaccurate.

The Problem

Manually testing speed or reliability is slow and easy to mess up. You might forget to test some parts or get distracted, leading to wrong results and unhappy users.

The Solution

Postman lets you automate these checks, running tests that measure speed, stability, and more without you lifting a finger. It keeps results clear and consistent every time.

Before vs After

✗ Before

Open app, start stopwatch, click button, stop stopwatch, note time

✓ After

pm.test('Response time is under 200ms', () => { pm.expect(pm.response.responseTime).to.be.below(200); });

What It Enables

With Postman, you can easily ensure your app stays fast and reliable, catching problems before users do.

Real Life Example

A team uses Postman to check their online store's checkout speed after every update, preventing slowdowns that could lose customers.

Key Takeaways

Manual speed checks are slow and error-prone.

Postman automates non-functional tests like performance and reliability.

This helps keep apps fast and dependable for users.