Why are interface method invocations slower than concrete invocations?
<p>This is question comes in mind when I finding difference between abstract class and interface.
In <a href="http://gcc.gnu.org/ml/java/1999-q4/msg00305.html">this post</a> I came to know that interfaces are slow as they required extra indirection.
But I am not getting what type of indirection required by the interface and not by the abstract class or concrete class.Please clarify on it.
Thanks in advance</p>
