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k6
Since 2017Modern load testing
Modern load testing — developer-friendly performance testing with JavaScript, real-time metrics, and CI/CD integration.
Overview
k6 is my load testing tool of choice. I write performance tests in JavaScript that simulate realistic user scenarios — API endpoints, authentication flows, database-heavy operations. I define thresholds for response times, error rates, and throughput. Integrated into CI/CD for automated performance regression detection. Results exported to Grafana for visualization.
Use Cases
- Load testing
- stress testing
- spike testing
- API performance
- soak testing
- CI/CD performance gates
- capacity planning
Advantages
- Developer-friendly JavaScript API
- low resource usage
- real-time metrics
- CI/CD integration
- Grafana dashboards
- cloud option
Considerations
- No browser-level testing (use Playwright for that)
- limited protocol support
- learning curve for complex scenarios