Component Execution Order:
The elements of the test plan are executed in an orderly manner, by doing the following:
The-a configuration element (config Element) element affects all components within its scope.
2 – The front processor (pre processors) element is executed before each sampler element within its scope.
The 3– timer element is valid for every sampler within its scope
4– Sampler (Sampler)
5– Post Processor (post processors, executed only if results are available) the component executes after each sampler element within its scope
The 6– assertion (assertions, which executes only when there is a result available) performs a validation on the results of each sampler component within its scope.
The 7– Listener (Listener, executed only when there is a result available) the component collects and renders information about each sampler component of its scope.
JMeter (1) Component Execution order