RTTI Overhead in C++

Question

What are the memory/performance overheads of enabling RTTI in a C++ program?
Can anyone please throw some light between the internal implementation of RTTI mechanism and

Answer 1

First there is no way to say exactly how much overhead is involved with out specifying a compiler and version as it is an implementation detail. That said it is well known that in some compilers dynamic_cast searches the class hierarchy doing string comparisons to match class names.