Performance Testing

what is Performance Testing?

This is a type of testing to ensure software applications will perform well under their expected workload.  A software application’s performance like its response time, reliability, resource usage and scalability do matter. The goal of Performance Testing is not to find bugs but to eliminate performance bottlenecks.

The focus of Performance Testing is checking a software program’s
Speed – Determines whether the application responds quickly.
Scalability – Determines maximum user load the software application can handle.
Stability – Determines if the application is stable under varying loads.

Why do Performance Testing?

Performance testing is done to provide stakeholders with information about their application regarding speed, stability and scalability. Performance Testing uncovers what needs to be improved before the product goes to market. Without Performance Testing, software is likely to suffer from issues such as: running slow while several users use it simultaneously, inconsistencies across different operating systems and poor usability. Applications sent to market with poor performance metrics due to non-existent or poor performance testing are likely to gain a bad reputation and fail to meet expected sales goals.

Types of Performance Testing

Load testing – checks the application’s ability to perform under anticipated user loads. The objective is to identify performance bottlenecks before the software application goes live.
Stress testing – involves testing an application under extreme workloads to see how it handles high traffic or data processing. The objective is to identify breaking point of an application.
Endurance testing – is done to make sure the software can handle the expected load over a long period of time.
Spike testing – tests the software’s reaction to sudden large spikes in the load generated by users.
Volume testing – Under Volume Testing large no. of. Data is populated in database and the overall software system’s behavior is monitored. The objective is to check software application’s performance under varying database volumes.
Scalability testing – The objective of scalability testing is to determine the software application’s effectiveness in “scaling up” to support an increase in user load. It helps plan capacity addition to your software system.

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