The JSR223 postprocessor allows you to use precompiled scripts within test plans. The fact that the scripts are compiled before they are actually used brings a significant performance boost compared to other postprocessors. This also allows a variety of programming languages to be used, including Java, Groovy, BeanShell, JEXL, and so on. This allows us to harness the powerful language features in those languages within our test plans.
JSR223 components, for example, could help us tackle preprocessor or postprocessor elements and samplers, allowing us more control over how elements are extracted from responses and stored as JMeter variables.
In this recipe, we will see how to use a JSR223 postprocessor within our test plan. We have chosen Groovy (http://groovy.codehaus.org/) as our choice of scripting language, but any of the other supporting languages will do:
Download the standard set of plugins from http://jmeter-plugins.org/.
Install the plugins...