This test runs a lot of configurations, and spends a lot of time serially. This is especially pronounced when run in prospective tier4 runs (
JDK-8273314). There are reports of multi-hour runs (see JDK-8271613). We can parallelize the test configurations for this test to make it hurt less. Also, timeouts need to be increased for test configs, because some of them are very slow in fastdebug mode.