Modern QA2026Key Takeaways -- Chapter 1
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1.5Key Takeaways -- Chapter 1

  1. Performance directly impacts revenue. Every 100ms of latency has a measurable business cost.
  2. Reliability is the foundation that makes performance valuable. A fast but unreliable system is worse than a slightly slower reliable one.
  3. Modern QA architects own performance and resilience, not just correctness.
  4. Performance testing is a continuous practice integrated into CI/CD, not a one-time activity.
  5. The testing lifecycle includes build-time checks, Lighthouse CI, API budgets, load testing, chaos testing, and production validation.