Gatling

Gatling is a powerful load testing tool. It is designed for ease of use, maintainability, and high performance. It uses an asynchronous (Akka/Netty) architecture that allows generating huge load from a single machine.

When to Use

• High-Concurrency Load Testing: Simulating tens of thousands of concurrent virtual users with minimal CPU and memory footprints.
• Performance Regression Gates in CI/CD: Running automated performance assertions against staging environments on every release.
• Scala / Java / Kotlin / TypeScript Load DSLs: Writing programmatic, version-controlled load testing scenarios as code.
• Protocol Benchmarking: Stress testing HTTP, WebSockets, Server-Sent Events, and JMS message queues.

Quick Start

import static io.gatling.javaapi.core.CoreDsl.*;
import static io.gatling.javaapi.http.HttpDsl.*;

public class BasicSimulation extends Simulation {