assertTrue("Second access should delay at least 100ms", elapsed2 >= 90);
    }

    /**
     * Test that cache is thread-safe with concurrent access
     */
    public void test_cacheThreadSafety() {
        final int numTasks = 50;
        final Long waittime = 50L;

        final HostIntervalController controller = new HostIntervalController();
        controller.delayMillisBeforeProcessing = waittime;