What's the fastest QVector operation

[Momergil]

Hello!

In copying some large data (lets say from an array) to a QVector, what should be faster?

Option 1:

for (int aaa = 0; aaa < SIZE_TO_COPY; aaa++)
{
    myVector.append(myArray[aaa]);
}

for (int aaa = 0; aaa < SIZE_TO_COPY; aaa++)
{
    myVector.append(myArray[aaa]);
}

To copy to clipboard, switch view to plain text mode 

Option 2:

const int startPoint = myVector.size();
const int lastPos = startPoint + SIZE_TO_COPY;
myVector.resize(lastPos);  //(myVector.size() + SIZE_TO_COPY)
 
for (int aaa = startPoint, bbb = 0; aaa < lastPos; aaa++, bbb++)
{
    myVector.replace(aaa,myArray[bbb]);
}

const int startPoint = myVector.size();
const int lastPos = startPoint + SIZE_TO_COPY;
myVector.resize(lastPos);  //(myVector.size() + SIZE_TO_COPY)

for (int aaa = startPoint, bbb = 0; aaa < lastPos; aaa++, bbb++)
{
    myVector.replace(aaa,myArray[bbb]);
}

To copy to clipboard, switch view to plain text mode 

Modifier 1: Include myVector.reserve(myVector.size() + SIZE_TO_COPY); before the loop in the first option or before the resize() in the second option.
Modifier 2: Use foreach(...) instead of for(...).

Thanks,

Momergil