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K6 – Performance Testing Masterclass with JavaScript (Udemy.com)

Learn API and Browser Load Testing using K6 -JavaScript, Web Vitals, Core Metrics & Grafana cloud Integration

Created by: Rahul Shetty Academy

Last updated March 2026

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What you will learn

  • Design and implement Load, Stress, Spike and Soak tests using K6 with real-world performance scenarios.
  • Design realistic load models using stages, thresholds, checks, tags and custom metrics.
  • Build end-to-end API load testing flows in K6 including registration, login and transactional scenarios.
  • Implement browser-level load testing using K6 Browser library with Playwright integration.
  • Measure and analyze API and Browser performance metrics including Web Vitals and page-wise tracking.
  • Integrate K6 with Grafana Cloud to visualize, monitor and analyze performance metrics in real time.
  • Execute end-to-end performance testing projects from planning to result interpretation.

How it compares

Against the other 281 rated Udemy courses in Software Testing on CourseDuck:

  • Rating4.7 out of 5higher than 87% of them
  • Reviews249#213 of 282 by number of reviews
  • Length6.2 hoursshorter than 54% of them
  • Last updatedMarch 2026more recently than 65% of them

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Course Description

Performance testing today is not just about generating load — it is about measuring, analyzing, and validating system behavior across APIs and browsers with proper observability.

This K6 Performance Testing MasterClass teaches you how to design complete performance testing solutions using K6 and JavaScript — covering both backend API flows and frontend browser-level validation.

You will start by mastering core K6 concepts including stages, thresholds, checks, tags, and custom metrics. You will learn how to design realistic load models and validate non-functional requirements effectively.

The course then walks you through building real-world API test flows such as registration, login, and transactional chains. You will extract dynamic data from JSON responses, implement assertions, and structure modular K6 scripts using JavaScript best practices.

Beyond APIs, you will integrate the K6 Browser library with Playwright to perform browser-level load testing. You will capture Web Vitals metrics such as LCP and CLS, track page-wise performance, and validate real user experience under load.

A dedicated section covers Grafana Cloud integration, where you will stream K6 metrics to Grafana dashboards for real-time monitoring, visualization, and performance analysis. This bridges the gap between load generation and observability — a key skill in modern DevOps environments.

Finally, you will integrate K6 tests into CI/CD pipelines to automate performance validation.

By the end of this course, you will be capable of designing scalable, observable, production-ready performance testing frameworks using K6.

This is a complete API + Browser + Observability Performance Engineering MasterClass.

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Instructor Details

Rahul Shetty Academy

"Nothing is Impossible. It all depends on how we are Trained on it."

"Teaching is my Passion. And it's my Profession. The only Business I know is Spreading Knowledge."

I'm Rahul Shetty (aka- Venkatesh), a QA instructor with a 15-year track record. Over 1 Million QA professionals from 195 countries have taken my courses on Selenium, Playwright, AI Testing, Software Testing (Jira), API Testing, Cypress, Postman, Appium, JMeter, and more..."

I lead top QA initiatives both online and offline — through Rahul Shetty Academy, one of the leading EdTech platforms for QA training; QASummit, a premier offline conference brand; and RS TekSolutions, my software consulting firm. Together, these ventures have helped hundreds of thousands of students master testing and automation, transforming their careers as Automation Engineers


"Many QA professionals aspire to learn cutting-edge automation, but 90% abandon their goals. It's not a lack of courses, but finding the right mentor who understands the QA mindset and tailors their teaching accordingly."

"As a QA engineer with nearly two decades of experience, I get it. I've built my courses strategically, focusing on practical skills and career growth. I believe I've cracked the code for teaching automation testing, and I'm thrilled to share it with you."

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Reviews

4.7

249 ratings on Udemy

Select a bar to show only those reviews.Select the bar again to show every rating.

By Zaheed Pathan on 6/11/2026

detail explanation of each steps of the flow

By Allan Rolle on 5/30/2026

Great course! I learned a lot and I can't wait to practice on a demo project.

By Ahmed Yosif on 5/1/2026

Good in general but needs lots of updates to match the latest versions of k6

By Anonymized User on 4/19/2026

Absolutely loved this course! It was engaging, clearly explained, and very practical. Thank you for creating such an excellent learning experience.

By Gavin Thys on 4/14/2026

This course provides you with the basic understanding of K6, devloping scrits and how to execute, this is exactly what i was looking without spending days on days.

By Gabriel Łyszcz on 3/24/2026

Great course—I learned a lot and would recommend it to anyone. There’s really a lot of information to take in. Sometimes the English was a bit unclear, but the subtitles helped. I’ll definitely take more courses from this instructor.

By Pramod Pardeshi on 3/4/2026

Excellent course for learning performance testing with k6. The concepts are explained clearly with practical examples and real-world scenarios. I especially liked the hands-on approach with Grafana Cloud dashboards and CI/CD integration. Highly recommended for QA engineers and developers who want to learn modern performance testing.

By Bhumija Kumari on 2/22/2026

Really enjoyed this course as an introduction to K6 and performance testing. The concepts are explained in a very simple and practical way, and the JavaScript examples are easy to follow. I liked that it focuses on real scenarios rather than just theory. By the end of the course, I felt confident writing and running my own performance tests and would definitely recommend it to others.

By Srushti B on 2/22/2026

I purchased this course to get a practical understanding of K6 and it did the job perfectly. The examples are easy to follow and feel closer to real-world use rather than just demo scripts. It helped me understand how to think about load and performance instead of blindly running tests. Overall, a useful course if you’re new to K6 and want to actually apply it. Thanks Rahul Shetty sir, for making this course easy to understand and implement in the real world

By Naseema Mariyam on 2/22/2026

I'm halfway through this K6 Performance course and I couldn't be more impressed! Rahul Shetty's teaching style is both engaging and approachable, making complex concepts easy to understand. The hands-on exercises helped me apply what I learned in real-world scenarios, especially with the API and browser load testing. I particularly loved how the integration with Grafana allowed me to visualize performance metrics in real-time. This course truly enhanced my skills and confidence in performance testing. I highly recommend it to anyone looking to upskill in this area!

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Overall Score : 94 / 100