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I was asked this question in an interview- “how much memory does a function use?”. So I tried to answer by saying you could add up all the memory taken by all the data variables , data structures it instantiates- for example add 4 bytes for long, 1 for char , 4 for int, 32 bits for a pointer on 32 bits system, and adding any inputs that were dynamically allotted. The interviewer was not happy with my answer.
I am learning C++, and will appreciate any insight.
From point of view of static behavior,
1. Data used by it – Sum of all variables memory sizes
2. Size of instructions – Each instruction written inside a function will occupy some memory in binary. That is how size of your function will be identified. This is nothing but your compiled code size.
From point of view of dynamic behavior (run time),
1. Heap memory resulted because of a function call is function memory.