How much overhead is there in calling a function in C++?

Question

A lot of literature talks about using inline functions to \"avoid the overhead of a function call\". However I haven\'t seen quantifiable data. What is the actual overhead o

Answer 1

For most functions, their is no additional overhead for calling them in C++ vs C (unless you count that the "this" pointer as an unnecessary argument to every function.. You have to pass state to a function somehow tho)...

For virtual functions, their is an additional level of indirection (equivalent to a calling a function through a pointer in C)... But really, on today's hardware this is trivial.