What is Performance Testing?

Performance testing is the testing to assess the speed and effectiveness of the system and to make sure it is generating results within a specified time as in performance requirements.
It falls under the class of black box testing.
Performance testing often used interchangeably with ‘stress’ and ‘load’ testing.
It intends to determine how a system performs in terms of responsiveness and stability under a certain load.
It can compare two systems to find which performs better. Or it can measure what part of the system or workload causes the system to perform badly.
There are basically four kinds of performance testing:
Load Testing is a type of performance testing conducted to evaluate the behavior of a system at increasing workload.
Stress Testing a type of performance testing conducted to evaluate the behavior of a system at or beyond the limits of its anticipated workload.
Endurance Testing is a type of performance testing conducted to evaluate the behavior of a system when a significant workload is given continuously.
Spike Testing is a type of performance testing conducted to evaluate the behavior of a system when the load is suddenly and substantially increased.

Quality Assurance