Load testing vs. stress testing vs. performance testing?

What is the difference between stress testing, load testing and performance testing? When is each type of testing needed?

11 Answer

author avatar

Performance Test - A performance test is done to verify that an IT system performs according to the non-functional requirements.
If non-functional requirements are not available a performance test can be done to verify the actual performance before a release.

Per definition ”Load Testing” and “Stress Testing” are two types of Performance Tests.

Load Test - A test that generates transactions to a targeted application with intention of verifying how the application reacts to a specific load.

Stress Test- A stress test is a performance test where the level of load is increased over the expected load in production.
The focus of the test can be to see how a specific function is handling high-load or as a test that generates production-like transactions with a higher than expected throughput.
The goal is to identify what part of the architecture design is limiting the performance and if the application recovers when the load is decreased.

Find out what your peers are saying about Micro Focus, Apache, Neotys and others in Performance Testing Tools. Updated: November 2020.
447,546 professionals have used our research since 2012.