Gatling
Gatling is a powerful open-source performance testing tool designed for analyzing and measuring the performance of various services, with a focus on web applications. It offers a high-performance scriptable tool that allows developers and testers to simulate hundreds of thousands of users realistically interacting with an application using HTTP, HTTPS, and other protocols. Gatling stands out for its ability to generate detailed, interactive, real-time reporting of performance metrics, making it easier for teams to identify bottlenecks and optimize the performance of their applications. Its efficiency, scalability, and user-friendly DSL (Domain-Specific Language) for test script creation make it a preferred choice for conducting comprehensive load testing, stress testing, and scalability testing in modern software development processes.