Apache JMeter
Apache JMeter is an open-source Java application designed for load testing, performance measurement, and functional testing of web applications and services. It simulates heavy loads on servers, networks, or objects to test their strength and analyze overall performance under different scenarios. It supports various protocols like HTTP, HTTPS, FTP, SOAP, REST, and JDBC, making it versatile for testing web and enterprise applications.
Developers should learn Apache JMeter when they need to ensure their applications can handle expected user loads, identify performance bottlenecks, and validate system reliability under stress. It is particularly useful for performance testing of web applications, APIs, and databases before deployment, helping to prevent downtime and optimize resource usage in production environments.