奇怪的c ++内存使用情况

Question

I have the follow class:

class testclass{
    int a[5];
};

and the following main function:

int main(int argc, const char * argv[])  
{
    testclass* t;
    while(true)
        t = new testclass();
    return 0;
}

So I exected this to just fill up all of my memory really quickly. But this is the memory usage graph that xcode is giving me:

Which I don't understand at all. How can the memory usage possibly go down in this program?

Answer 1

oke answered. The graph seems to only show physical memory usage. When I go the the activity monitor, I can see that the virtual memory usage is huge:

That's in dutch but I think you'll understand it.

Thanks for the answers