Gatling
Gatling is an open-source load and performance testing tool designed for web applications, APIs, and microservices. It uses a Scala-based DSL (Domain-Specific Language) to write test scenarios and provides detailed reports with metrics like response times, throughput, and error rates. It is known for its high performance, scalability, and ability to simulate thousands of virtual users with minimal resource usage.
Developers should learn Gatling when they need to conduct performance testing for web applications, REST APIs, or microservices to ensure reliability under high traffic. It is particularly useful for DevOps and QA engineers in continuous integration pipelines, as it integrates well with tools like Jenkins and Maven. Use cases include stress testing e-commerce sites, validating API performance in cloud environments, and benchmarking system scalability before deployment.