Listeners
These components gather the results of a test run, allowing it to be further analyzed. In addition, listeners provide the ability to direct the data to a file for later use. Furthermore, they allow us to define which fields are saved and whether to use CSV or XML format. All listeners save the same data, with the only difference being the way the data is presented on screen. Listeners can be added anywhere in the test, including directly under the test plan. They will collect data only from the elements at or below their level.
JMeter comes bundled with about 16 different listeners, all serving different purposes. Though you will often use only a handful of them, it is advisable to become familiar with what each one offers to know ...
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