Apache JMeter Performance Testing Explained

The Test Lead
3 min readMar 15, 2022

Apache JMeter is a testing tool from Apache and is most often just referred to as JMeter. It is an open-source application meaning it is free to use. There are 20,000+ companies currently using JMeter, many of which have over 100Million USD in revenue. It is mostly found in the United States in the Software Industry.

So now that you see Apache JMeter is pretty popular, what exactly does it do and why is it so widely used?

This article will cover:

  • What is JMeter?
  • What are the pros and cons of JMeter
Photo by Emily Morter on Unsplash

What is JMeter?

JMeter itself is a Java-based tool from Apache. It allows its users to do load testing and analyze the performance of different services and applications. It is mainly focused on the testing of web applications. Currently, JMeter can be used for performance testing static as well as dynamic web applications.

Load testing is a type of performance testing. Performance testing generally measures and evaluates the speed, responsiveness, and stability of a computer, network, software application, or device under a workload. For our purposes, JMeter can be used to simulate a heavy load on networks, servers, or objects. For example, when a million users are using an application at the same time, will it slow down? What about we lower the number of users to 1,000 will it stay consistent or speed up?

Why are tools like JMeter needed?

Knowing how much load or volume your application can handle is very important. The goal is always to have the best end-user experience. End users should not see any large difference in the use of the application whether there are 100 or 100Millions users actively using it. If this is not tested properly your application can slow down greatly and even crash once it experiences a certain amount of volume. This is a terrible experience for an end-user. Imagine every time you…

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