How do virtual functions impact performance in C++?
An example of an AI chatbot conversation about C++ virtual functions and their performance implications.
How do virtual functions impact performance in C++?
Virtual functions allow for dynamic polymorphism, but they can introduce overhead due to vtable lookups.
What is a vtable?
A vtable is a table used to resolve function calls at runtime, enabling dynamic dispatch for virtual functions.
Does using virtual functions slow down my program significantly?
The performance impact is generally small, but it can add up in performance-critical applications. Profiling is key.
Are there alternatives to virtual functions?
Yes, you can use templates or static polymorphism, which can avoid the overhead of virtual functions.
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