How much memory was actually allocated from heap for an object?

Question

I have a program that uses way too much memory for allocating numerous small objects on heap. So I would like to investigate into ways to optimize it. The program is compile

Answer 1

[EDIT] This answer is wrong! I'm leaving it as an example of what not to do. The sizeof function operator works at compile time.

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Have you tried:

SomeClass* some_instance = new SomeClass;
printf("Size of SomeClass == %u", sizeof(*some_instance) );

I seem to recall that by passing in an instance of a class you should get the size that was allocated.