QList memory deallocation

Question

I'm trying to free memory after using QList, but it doesn't seem to work properly. Here's my code:

QList<double> * myList;
myList = new QList<double>;

double myNumber;

cout << "CP1" << endl;
getchar();  // checkpoint 1

for (int i=0; i<1000000; i++)
{
    myNumber = i;
    myList->append(myNumber);
    cout << myList->size() << endl;
}

cout << "CP2!" << endl;
getchar();  // checkpoint 2


for (int i=999999; i>0; i--)
{
    myList->removeLast();
    cout << myList->size() << endl;
}

cout << "CP3!" << endl;
getchar();  // checkpoint 3

delete myList;

cout << "CP4!" << endl;
getchar();  // checkpoint 4

Memory usage:

• CP1: 460k
• CP2:19996k
• CP3:19996k
• CP4:16088k

So it looks like despite removing of elements and deleting myList still large part of memory is being used. I believe there is a way to handle it but I can't find it.

Thanks in advance for any help.

Pawel

Answer 1

Memory manager is not required to release the memory your program has allocated. There are no problems in your deallocation.