This article was originally published on AI Study Room . For the full version with working code examples and related articles, visit the original post. Performance Testing Performance Testing Performance Testing Performance Testing Performance Testing Performance Testing Performance Testing Performance testing ensures that applications meet speed, scalability, and stability requirements under expected and peak loads. This article explores the leading performance testing tools—k6, Locust, and Gatling—along with test design principles and results interpretation. k6 k6, developed by Grafana Labs, is a modern load testing tool built on JavaScript. Tests are written as JavaScript scripts that define HTTP requests, checks, and thresholds. k6 compiles the JavaScript to Go for efficient execution. k6's key features include a built-in metrics system, thresholds that automatically fail tests when performance degrades, and integration with Grafana dashboards.…