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Load Testing vs. Stress Testing

Load testing

The load testing is the most important essential part of performance testing which is used to check the performance of an application by applying some load like less than or equal to the desired load is known as load testing. And the load is a quantity, which means it only focuses on the numbers of users.

Stress testing

The stress testing is testing, which checks the behavior of an application by applying load greater than the desired load. Since it is non-functional testing, so we use this testing when the application is functionally stable.

Difference between Load testing and Stress testing

Load testing	Stress testing
Load testing is used to find the performance of the application by testing the database, networks, and website servers.	Stress testing is used to find the stability and response time of the given system.
Load testing helps the tester to identify the bottleneck and also able to tell the cause of bottlenecks before deployment to the production server.	Stress testing helps the tester to check the system capacity when number of users increased suddenly before the system failure or crashed.
This type of testing reproduced the load on any application and software.	It is used to figure out the robustness and stability of the application.
Load testing is used to test web-based and client-server types of application.	Stress testing tests suddenly increased traffic of the application.
WebLOAD, LoadView, LoadRunner, SmartMeter.io, and LoadUI NG Pro are some of the load testing tools which help us to perform load testing on the applications.	LoadRunner, JMeter, NeoLoad are some of the stress testing tools which help us to perform stress testing on the applications.
After doing the load testing on the application, the cost of failure may reduce, and the satisfaction of the customer is increased.	After doing Stress testing on the application, if the system got to fail, it will recover quickly by finding the breaking point early and also see where the system got crashed.
For example: if we have one scenario where the load is 100 users using the application at a 2.5sec of goal time. And, the desired load is 100 user. This scenario got passed because the desired load is equal to the load, which satisfies the load testing condition.	For example: if we took the same scenario where the actual load of 100 users which are using the application at a 2.5sec of goal time. When the desired load got increased by 200 users, and it will become 300. So now, 300 users using the application at 2.5sec of goal time. It will pass because the desired load is greater than the load according to the stress testing condition.

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