Apache JMeter  is a 100% pure Java desktop application designed to load test client/server software (such as a  web application  ). It may be used to test performance both on static and dynamic resources such as static files, Java Servlets, CGI scripts, Java objects,  databases  ,  FTP servers  , and more. JMeter can be used to simulate a heavy load on a server, network or object to test its strength or to analyze overall performance under different load types.

Additionally, JMeter can help you regression test your application by letting you create test scripts with assertions to validate that your application is returning the results you expect.

Here’s the User’s Manual

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