QVector copy constructor

[Caius Aérobus]

Are you sure you even need QVector? For most purposes, QList is the right class to use. Do you really need continuous memory?

generally either I process every item in a for loop or I use direct accesses using indices, so I suppose it works quicker on continuous tables...

[jpn]

I recommend reading Generic Containers documentation. Pay special attention to "algorithmic complexity".