Test support device

A test support device comprising:

• a test execution unit that executes a performance test on a microservice as a test target and acquires a result of the performance test;
• a resource cause determination unit that determines, in a case where it is determined from the result of the performance test that the microservice is poor in performance or/and resources, whether a cause of being poor in the performance or/and the resources of the microservice is in an application implemented in the microservice or in resources of the microservice;
• and
• an application cause determination unit that determines, in a case where it is determined that the cause of being poor in the performance or/and the resources of the microservice is in the application implemented in the microservice, determines application processing as a cause candidate from a relationship between the application process and the result of the performance test.