Performance testing is a form of software testing that focuses on how a system running the system performs under a specific load. This is not about finding software bugs or flaws. Performance testing measures according to benchmarks and criteria. Performance testing should give programmers the diagnostic information that they need to get rid of bottlenecks.
To understand how applications will perform on customers' systems, there different types of performance tests that may be applied during software testing. This can be non-functional testing, which was made to find out the openness of a method.
Load Testing
Load testing steps system functionality as the workload increases. That workload could mean concurrent transactions or users. The system is monitored to measure response time and system staying power as workload increases. That workload falls within the parameters of normal working conditions.
Unlike load testing, pressure testing -- also called fatigue testing -- is supposed to quantify system performance outside of the parameters of normal working conditions. The program is given more users or transactions that may be handled. The goal of stress testing is to gauge the software equilibrium. At what point does software fail, and how does the applications recover from collapse?
Spike Testing
Spike testing is a type of stress testing that assesses software functionality when workloads are substantially increased quickly and repeatedly. The workload is beyond ordinary expectations for short amounts of time.
Endurance Testing
Endurance testing -- also known as soak testing -- is an evaluation of how software performs a normal workload within a protracted amount of time. The objective of endurance testing is to check for system problems such as memory leaks. (A memory leak occurs when a system fails to release lost memory. The memory leak can impair system performance or cause it to fail.)
Scalability Testing
Scalability testing is used to determine if software is effectively managing increasing workloads. This may be figured out by slowly adding to the consumer load or information volume whilst monitoring system functionality. Additionally, the workload may remain at precisely the same level while resources such as CPUs and memory have been altered.
Most Common Problems Observed in Performance Testing
During performance testing of software, developers are looking for performance symptoms and issues. Speed problems -- slow answers and lengthy load times such as -- frequently are observed and addressed. But there are additional performance problems that can be observed:
Bottlenecking -- This occurs when data flow is interrupted or halted because there's not enough capacity to handle the workload.
Poor scalability -- When applications cannot handle the desired variety of concurrent tasks, results could be delayed, errors could rise, or other unexpected behaviour could occur that impacts:
- Disc usage.
- CPU usage.
- Memory leaks.
- Operating system limits.
- Poor network setup.
Computer software configuration problems -- Often settings aren't set at a decent level to handle the workload.
Insufficient hardware resources -- Performance testing may reveal physical memory constraints or low-performing CPUs.
In Software Engineering, Performance testing is necessary before marketing any software product. It ensures customer satisfaction & protects an investor’s investment against product failure. Costs of performance testing are usually more than made up for with improved customer satisfaction, loyalty, and retention.
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