QVector QVarLengthArray speed question

[TheKedge]

Hello all,
just a quick question - apparently QVarLengthArray is faster assigining memory. But is
QVector<> (with any assignable basic type) slower in a loop e.g. using ...

QVector<short> vector (1024);
for(int i=0; i<vector.size();++i){
someShort = vector.at(i);
or 
vector[i] = i;
}

QVector<short> vector (1024);
for(int i=0; i<vector.size();++i){
someShort = vector.at(i);
or 
vector[i] = i;
}

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or should I make a short* from vector.data() and put the pointer into the loop?
By the way, does the vector.size() get calculated every iteration?

thanks
K

[wysota]

But is
QVector<> (with any assignable basic type) slower in a loop e.g. using ...

No, lookup in QVector is O(1).

By the way, does the vector.size() get calculated every iteration?

No, it doesn't.

inline int size() const { return d->size; }

inline int size() const { return d->size; }

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