Common Performance Testing Mistakes

Performance testing is defined as the technical investigation performed to determine or validate the speed, scalability, and/or characteristics’ stability of the product under testingPerformance testing can be a challenging field to get into.  Many companies with web and mobile apps often have performance issues because they are not executing the performance tests, or they may not be testing under real-world scenarios. Not everyone will execute performance tests properly, there are some common mistakes and here’s a summary of what to avoid.


  • Wrong/Lack of planning

Many organizations don’t include performance considerations during the design phase. This can lead to problems during the next phases of the software development cycle. In performance testing, planning each phase is crucial. You must to keep in mind the Correlation phase, this is a complicated and difficult phase, sometimes it requires more time and effort.

  • Wrong Workload Model

Accurate elaboration of workloads is the first step in conquering performance issues. Workload models provide information on what type of user actions will be tested under load, what the business scenarios for all users will be, and what will the users’ distribution be on every scenario. Remember, before you can break a web or mobile app, you need to learn and understand its anatomy.

  • Unrealistic test environment

Choosing the performance test environment is a challenging task that can require great technological and organizational efforts. If the test environment is not realistic, the test results will not be accurate.

  • No assertion in the script

Assertion helps to verify that your server returns the expected results under test.

  • Saturate the Load Generating Machine

Minimal hardware-level features or too many virtual users interacting with the application can contribute to overload the generator machine. This will have a negative impact on response times.

  • Not Including Think Time

Think times are used to simulate the user behavior of waiting in between interactions with a web or mobile app. Implementing think time within the performance test is critical in creating more accurate load simulations.

  • Not Documenting

The repetition of scenarios and the comparison of results between executions or iterations are an important activity in performance testing. That process can become complicated when there are many iterations, parameters, virtual users, orders, etc.  Make sure to document issues such as scenario objectives, exact settings of the system under test, test environment settings, and results and conclusions for each scenario run.

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