When should I write the keyword 'inline' for a function/method?

Question

When should I write the keyword inline for a function/method in C++?

After seeing some answers, some related questions:

• When should I <

Answer 1

When one should inline :

1.When one want to avoid overhead of things happening when function is called like parameter passing , control transfer, control return etc.

2.The function should be small,frequently called and making inline is really advantageous since as per 80-20 rule,try to make those function inline which has major impact on program performance.

As we know that inline is just a request to compiler similar to register and it will cost you at Object code size.