Performance testing is a non-functional testing technique that exercises a system and then , measures, validates and verifies the response time, stability, scalability, speed and reliability of the system in production-like environment.

1. PERFORMANCE TESTING
PERFORMANCE TESTING IS A NON-FUNCTIONAL TESTING TECHNIQUE THAT
EXERCISES A SYSTEM AND THEN , MEASURES, VALIDATES AND VERIFIES THE
RESPONSE TIME, STABILITY, SCALABILITY, SPEED AND RELIABILITY OF THE
SYSTEM IN PRODUCTION-LIKE ENVIRONMENT.
IT MAY ADDITIONALLY IDENTIFY ANY PERFORMANCE BOTTLENECKS AND
POTENTIAL CRASHES WHEN THE SOFTWARE IS SUBJECTED TO EXTREME
TESTING CONDITIONS. THE SYSTEM CAN THEN BE FINE-TUNED BY IDENTIFYING
AND ADDRESSING ROOT CAUSE OF THE PROBLEM.

2.  Performance Testing Metrics
 Every system has certain Key Performance Indicators (KPI’s) or metrics that are
evaluated against the baseline during Performance testing.
 Some of the commonly used Performance Metrics are described below.

3.  Performance testing helps testers and developers in identifying areas of
improvement to deliver a robust and efficient product to the end users.
 Performance testing report and analysis aids the stakeholders to understand the
functioning of the product in the test scenario. They can accordingly make
strategic business decisions on improvements before it is launched in the market.
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