About this ebook
Performance Testing with k6 is the practical, hands-on guide that takes you from complete beginner to confident performance engineer. Written for developers, QA engineers, and DevOps professionals, this book teaches you how to find performance bottlenecks before your users do — using k6, one of the fastest-growing open-source performance testing tools available today.
Unlike theoretical textbooks, every concept in this book is taught through clear, working JavaScript code examples that you can run immediately. You will learn by doing — writing real load tests, interpreting real results, and fixing real performance problems.
What you will learn:
How to write k6 load tests from scratch using JavaScript — no prior k6 experience needed
Load testing, stress testing, spike testing, and soak testing — when to use each and how to design them
How to define thresholds that automatically pass or fail your tests in CI/CD pipelines
Integrating k6 with GitHub Actions, GitLab CI, Jenkins, and CircleCI for automated performance gates
Visualising live test results with Grafana and InfluxDB dashboards
Testing WebSockets, gRPC services, and real browser interactions including Core Web Vitals
Running globally distributed tests with k6 Cloud and the Kubernetes Operator
Five complete real-world case studies covering e-commerce, payments APIs, chat services, and more
By the end of this book you will have a fully automated performance testing program integrated into your development workflow — catching regressions before they reach production, protecting your users from slow and unreliable software, and giving your team the confidence to deploy faster.
This book is for you if:
You are a developer, QA engineer, or DevOps professional who wants to master performance testing
You know JavaScript basics but have never written a performance test before
You have tried other performance testing tools and found them too complex or too rigid
You want to integrate automated performance validation into your CI/CD pipeline
Covering 15 structured chapters, 100+ working code examples, and a 30-day action plan, this is the most complete k6 resource available — your definitive reference for performance testing modern web applications.
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About the author
Debashish Mohapatra is a software engineer by profession and a passionate writer by choice. With a deep curiosity for both the seen and unseen layers of life, his writing spans a unique blend of genres—from health and wellness to history and technology. He believes that knowledge, when shared through stories, becomes transformative.
Debashish is the author of three well-received books: The Art of Living a Healthy Life, The Magnetic Aura, and The Forgotten Art of Transition. In his fourth book, The Lost Centuries, he dives into one of history’s greatest enigmas—the Dark Ages—unraveling forgotten empires, lost knowledge, and the silence of vanished civilizations.
Whether decoding ancient mysteries or exploring modern challenges, Debashish brings clarity, depth, and human connection to every page he writes.
When he’s not immersed in code or manuscripts, he spends his time exploring cultures, studying forgotten timelines, and crafting ideas that bridge the past with the present.
