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Performance testing includes multiple, distinct facets to fully exercise the software and hardware and identify any weaknesses, as well as a benchmark where and when the issues arise. Different tests are used to verify the performance from varied angles.
Testing is conducted to determine the failure threshold of a system by gradually increasing the number of concurrent users until the system's response time is slowed. This data provides us with the ideal load thresholds, and helps us recognize the areas that need improvement. Generally, this testing can uncover any buffer overflow issues, memory leaks, or load balance difficulties.
Volume testing focuses on data volume. Similar to the concurrent users’ threshold, the amount of data processed or transferred slowly increases. This test ascertains the amount of data that your website can handle before it begins to show glitches or completely cease to respond.
Security testing is a type of non-functional testing which aims to assess whether an application or system is vulnerable to any attacks. It is conducted to make sure that confidential data is secure and the system is still able to operate effectively. If any information is compromised, it could result in financial losses for the business. Therefore, security testing focuses on analyzing data encryption, firewalls, and other entry points that could be used by malicious entities.
Performance testing as a whole involves multiple facets, such as load testing, which is done to fully exercise the software and hardware and identify any weaknesses, as well as to create a benchmark to show where and when any issues arise.
Using usage statistics, three types of loads are determined during load testing: a normal load, a heavy load, and a projected growth load. Starting with the lighter load, the number of concurrent users is increased incrementally until the system's response time begins to slow down. This process is continued until the system stops responding completely, thus revealing the failure threshold. This data is then used to establish the load boundaries and find possible bottlenecks.
Scalability testing is an important part of performance engineering which ensures that an application continues to meet the demands of increasing user traffic, transaction counts, frequency of transactions, and data volume. It tests the system, network, processes, and database's ability to scale up and handle a growing need, without resulting in prolonged wait times. Furthermore, scalability testing can determine how the application behaves when deployed on larger systems, or when additional systems are added to it.
The aim of usability testing is to assess how quickly a user can complete their tasks, how simple it is for them to understand the main functions, and how convenient the software is for the end user. How many errors does the user encounter? How much does the user like the system?.
Usability testing requires some creative thinking, a good understanding of usability issues, great observation skills on the part of the testers, and a willingness to be open to suggestions and Ideas from the developers or stakeholders that are new.
Portability testing is a non-functional testing methodology that determines the ease or difficulty with which a software component or an application can be moved from one environment to another. The test results obtained from Portability Testing help in finding out how easily a software component from one environment can be used in another environment.
