public void testHashMapClassName() {
        Map<String, Class> map = new HashMap<String, Class>();
        for (int i = 0; i < COUNT; i++) {
            Class oldValue = map.put(CLAZZ.getName(), CLAZZ);
            Class value = map.get(CLAZZ.getName());
        }
    }
Just to verify testHashMapClassObject is fastest. Ignore this test.
EventBusTest/src/org/greenrobot/eventbus/ClassMapPerfTest.java