The JIT has access to the actual run time class hierarchy and can devirtualize method calls. In C++, if a method is virtual, the system can never decide "oh, th

The JIT has access to the actual run time class hierarchy and can devirtualize method calls. In C++, if a method is virtual, the system can never decide "oh, this method has only one implementation, so let's always call that" because it must statically assume multiple implementations to be present.