Load Testing with K6
Prove your API holds up before users find out it doesn't.
~1 h
10
4
4
Disable AI suggestions while you learn
This course teaches you to hand-write every line of code. Open VS Code (or your editor of choice) and turn off Copilot, Cursor Tab, Tabnine, Codeium, and any inline AI autocomplete before you start a lesson.
AI mid-completion robs you of the small mistakes that make concepts stick. You'll be a faster, more independent developer at the end of the course if you type every character yourself. Re-enable AI for your real work after — never during a lesson.
Goal of this course: learn, not ship fastest.
What you'll build
A k6 test suite for your Grit API with 6 scenario types, run locally and in CI, that catches regressions before they ship.
What you'll learn
Course outline
k6 Fundamentals
Install, write your first test, understand the output.
The Five Test Types
Smoke, load, stress, spike, soak — when to run each.
Finding the Bottleneck
When the test fails, where do you look?
k6 in CI
Block regressions in PRs.
Prerequisites
- ›Completed Building a Go API
- ›Comfortable in a terminal
Who this is for
- ›Devs shipping APIs to production
- ›SREs setting up performance gates
- ›Teams who got burned by a surprise outage at launch
Ready to start?
Lesson 1 takes ~6 minutes. By the end of this hour you'll be writing real code.