What is the cost of a function call?

Question

Compared to

• Simple memory access
• Disk access
• Memory access on another computer(on the same network)
• Disk access on another computer

Answer 1

If the function is inlined at compile time, the cost of the function becomes equivelant to 0.

0 of course being, what you would have gotten by not having a function call, ie: inlined it yourself.

This of course sounds excessively obvious when I write it like that.