In the field of software testing, one of the most primary aspects related to the efficient working of a product after release is its evaluation under the banner of performance testing. Popularly known as “Perf Testing”, Performance Testing is a subset of performance engineering. It is a type of testing that is executed to ensure that the performance of a software application is suitable and perfect under the expected workload. It is the process of determining the speed, effectiveness, reliability, scalability, and other important features and elements of the system. Moreover, performance testing can be used to compare two or more applications to compare their system speed, data transfer rate, bandwidth, efficiency and reliability.
During the process of performance testing, the system is tested under a mixture of load conditions, where the required response time is tested by the system under varying workloads. Furthermore, software performance testing involves the testing of application under test to ensure that application is working as expected under variety of load conditions. The goal of performance testing is not only find the bugs in the system but also to eliminate the performance bottlenecks from the system.
An application needs to be tested for stability and responsiveness under varying workloads. Besides, it also needs to be tested for scalability and resource usage. Performance testing encompasses the examination of all such attributes. Some of the common problems that can cast a shadow on a product's performance are:
Depending on the sophistication involved, some apps can take an enormously long time to reboot/ load. Ideally, it should only be a matter of seconds.
It means a huge lag in time between feeding the input by the user and the output achieved from the system. Generally users lose interest with such apps.
These are faults in code which result in deteriorating quality of performance. Its sources can be limitations of operating systems, insufficient RAM memory, etc.
Load Testing is performed to gauge the behaviour of a system working under expected user loads. All impediments in the software along with those in the hardware in which it is installed are identified through a vigorously tested monitoring of all the application servers and in-built databases.
Stress Testing helps in finding out the maximum load under which the system software can sufficiently perform its tasks, before breakdown.
Soak test finds out the enduring capacity of the product to perform well under the expected loads, for a sustained period of time.
Sometimes there is a sudden surge in load on a system, created due to the increased user demand. Spike testing evaluates the ability of a system to withstand such loads without crashing in such emergency scenarios.
Configuration Testing helps us to judge the ability of the software to respond positively to minor changes in configuration modules at the time of a system upgrade or patch.
Sometimes a test case can cause faults in the working of a system. Isolation Testing involves identifying and segregating the fault territory.
Under Volume Testing large number of data is populated in database and the overall software system's behaviour is monitored. The main goal here is to check software application's performance under varying database volumes.
Many a times a business enterprise has to alter the scale of its projects for expansion purposes. Scalability Test helps to evaluate, if the software product can scale up its effectiveness, to counter the demands of an enlarged user base.
The process of performance testing revolves around the quality and effectiveness of application and software’s scalability, speed and stability. Throughout the execution of testing, each of these elements of the software are monitored, which makes sure that the application or the software performs properly. However, while executing performance testing developers and testers come across various issues and discrepancies, which makes the whole process time consuming and difficult. Hence, here is a list of some common issues found during the process of testing the performance of an application.
Some of the widely used performance testing tools in market, based on the working environment and testing parameter are:
Our next blog highlights the complete list of top 10 performance testing tools.
It's clear that an organisation's name is wholly dependent upon the longevity and final working quality of the product. Performance testing gives a fool proof guarantee of it's efficiency.To get detailed information about performance testing process visit this link.