CCAK: Certificate of Cloud Auditing Knowledge

When security testing has to cover a large code base inside a tight time window, the tests are split and run concurrently across multiple agents or environments, which is parallel testing; it shortens elapsed time without reducing coverage and fits CI/CD pipelines. Regression testing only confirms that changes did not break existing behaviour, and a full regression suite is itself what grows slow on large code sets. Full-stack unit testing and functional verification address scope and correctness, not completion time.