Complete Modern C++ - Inline Functions

The video tutorial explains the concept of function calls and their overhead in programming. It discusses how macros can be used to avoid this overhead but highlights the potential for errors due to text substitution. The tutorial then introduces inline functions in C, which allow the compiler to replace function calls with the function body, thus avoiding overhead while maintaining function semantics. The video also compares the assembly output of inline and non-inline functions, emphasizing the benefits of inline functions. Finally, it compares macros and inline functions, recommending the use of inline functions for small functions in C.

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