Software Performance Testing: How a System Behaves Under Stress
Performance testing answers 'how does it work under load?' It simulates user traffic to measure a system's responsiveness, stability, and resource use. The footgun is testing unrealistic scenarios instead of finding real-world breaking points.
Performance testing goes beyond functional correctness to answer 'how does it behave under stress?' It simulates a specific workload—like Black Friday traffic—to measure responsiveness, stability, and scalability. This helps validate if a system can handle its expected load and finds bottlenecks before they cause outages. The biggest footgun is testing unrealistic 'happy path' scenarios; the goal is to find the system's actual breaking points and resource limits, not just confirm it works with light traffic.
Read the original → Wikipedia: Software performance testing
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