Overview

Are your performance tests giving you false confidence? Every week, teams ship software that passed performance testing - and then watch it collapse under real traffic. The tests ran. The results looked fine. Production failed anyway. The Performance Testing Playbook is a practitioner's field guide for software engineers and QA leads who are done with performance tests that tick boxes but protect nothing. Written for the real world - not the textbook - this playbook draws on documented industry failures, hands-on tooling guidance, and hard-won engineering principles to help you build tests that actually reflect how your system behaves under pressure. What you'll learn: Why most performance tests are fundamentally useless - and the five specific mistakes that make them so How to choose the right test type (load, stress, soak, spike, breakpoint) for every scenario Workload modelling techniques that reflect real user behaviour - not artificial traffic patterns A complete JMeter field guide: thread groups, samplers, assertions, correlation, and the mistakes that silently invalidate your results k6 for modern teams: JavaScript scripting, thresholds as code, and CI/CD integration that makes performance a continuous gate - not a last-minute check How to read the metrics that matter: p95, p99, throughput, error rate, and saturation - and what each one hides A systematic approach to finding and fixing bottlenecks using APM data and request tracing How to translate performance results into business risk - and present findings that actually drive decisions Real incidents. Real lessons. From the $1.7 billion Healthcare.gov collapse to Knight Capital's $440 million trading catastrophe - this book grounds every principle in documented failures that show exactly what is at stake when performance testing is treated as a formality. Whether you are preparing for your first major launch, integrating performance into a CI/CD pipeline, or trying to convince stakeholders that p99 latency is a business problem - this playbook gives you the framework, the tools, and the language to do it right. Who this book is for: Software engineers, QA leads, DevOps engineers, and engineering managers who want performance testing that produces valid, actionable results - not just green dashboards.

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