Utilising functional automation frameworks for performance testing leverages existing test scripts to assess system behaviour under load, reducing duplication and effort. Frameworks like Selenium ,Karate when integrated with tools such as JMeter or Gatling, enable reuse of functional test cases for simulating real user interactions at scale. This approach provides valuable performance insights while maintaining test consistency. It enhances early performance validation during development cycles and supports integration into CI/CD pipelines. By combining functional accuracy with load execution, teams can identify bottlenecks, ensure responsiveness, and improve system reliability—making functional automation a powerful asset in performance testing strategies.