How To Get Started With Load Testing?

Image for post
Image for post

We have all been in situations while using a software or a web application, everything is running too slow. You click a button and nothing is happening except a loader animation spinning for an infinite time.

The worst case is when end users face this kind of issues. This is bad news for the developer or the owner of the application. These are because of performance issues, and the only way this can be eliminated is through performance testing.

What is Performance Testing

Types of Performance Testing

Load Testing

This type of performance testing is performed to diagnose the system’s behavior when the workload is increasing

Stress Testing

It is conducted to find out how the application is working when the system is just at the boundary or already exceeding its workload capacity.

Endurance Testing

This type of testing finds out how the system is performing when continuously operated under a specific workload.

Spike Testing

It produces a diagnostic report of a system’s performance when the workload is increased all of a sudden at an elevated level.

In this article we will focus on Load Testing.

Why Load Testing is Needed

Load testing gives the developer and site owner confidence in their system’s performance and reliability. It also helps to detect the bottleneck by virtually creating a test scenario involving increased network traffic long before it actually happens in production environment. It also provides complementary strategies to deal with performance management and monitors the application running at production environment.

Prerequisites and Environments for Load Testing

The primary measuring parameter of load testing is the system’s response time. Before the testing begins, you should gather the knowledge regarding whether the response time is already measured, whether it is applicable to business process, whether it is achievable and justifiable and if it can be measured using a stopwatch or a tool.

Image for post
Image for post

Load Testing Life Cycle

  • At first a dedicated test environment is created.
  • Load testing scenarios are to be determined next.
  • Each load testing scenarios should include proper maintenance of diagnostic data, a predictable number of users who will be accessing the system, connection speed of the networks to be used by end user, server configurations and finally, operating systems and browsers to be used by the end user.
  • The tester starts running the test cases and after proper monitoring, gathers all the metrics.
  • The results are then analyzed and procedures for performance improvement is suggested.
  • The system is fine tuned and the test cases are executed again

Popular Load Testing Tools


It is an enterprise grade testing tool designed mainly for DevOps and Agile methodology. It provides the user with automatic design of test case scenarios, along with automatic maintenance and continuous analysis of data NeoLoad can also be easily integrated with the testing ecosystem. It can be easily installed on servers like Jenkins and used along with functional tools like Selenium.


It is a cloud-based platform that offers complete flexibility to the tester. It can test web APIs like SOAP, REST, JSON along with web servers and generates a series of GET and POST requests. It can also stimulate user behavior on critical functionalities like login, form submits etc. The tool is fully manager of cloud and available for a free trial.


WebLOAD is another enterprise grade product that supports multiple applications, technologies, operating systems and network protocols. It is well known for its flexibility and the scripting gives you the privilege of smoothly executing complex test case scenarios.

Challenges in Load Testing

It can be said that performance testing is a mandatory phase before an application is deployed in the production environment. And especially when it comes to resolving bottlenecks and making the application stable and scalable, load testing is an important performance testing procedure that can help to detect the maximum functioning capacity of the application.

Image for post
Image for post

Originally published at on July 18, 2018.

Author: Arnab Roy Chowdhury

Written by

Product Growth at @lambdatesting (

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store