What is performance testing?
💡 Model Answer
Performance testing is a type of non‑functional testing that evaluates how a system behaves under expected and peak load conditions. Its primary goal is to identify bottlenecks, measure response times, throughput, resource utilization, and scalability limits. Common performance tests include load testing (simulating normal user traffic), stress testing (exceeding capacity to find breaking points), endurance testing (long‑duration runs to detect memory leaks), and spike testing (rapid load changes). Metrics such as average response time, maximum response time, transactions per second, CPU and memory usage, and error rates are collected. For example, a web application might be load‑tested with 500 concurrent users to ensure it maintains an average response time below 2 seconds. The results guide capacity planning, optimization, and infrastructure scaling decisions.
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