public EventBusBuilder eventInheritance(boolean eventInheritance) {
        this.eventInheritance = eventInheritance;
        return this;
    }
By default, EventBus considers the event class hierarchy (subscribers to super classes will be notified).
Switching this feature off will improve posting of events. For simple event classes extending Object directly,
we measured a speed up of 20% for event posting. For more complex event hierarchies, the speed up should be
greater than 20%.
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However, keep in mind that event posting usually consumes just a small proportion of CPU time inside an app,
unless it is posting at high rates, e.g. hundreds/thousands of events per second.
EventBus/src/org/greenrobot/eventbus/EventBusBuilder.java