QVector copying data with remove()

[wysota]

The only way to avoid copying is to use some other data collection, like QList<>.

Not really. QList is implemented in a similar way as QVector with the only important difference that QVector always grows "at the far end" while QList can grow in both directions (meaning that if you need to insert an element in the first half of the data structure, the list will grow at the near end, if you insert in the second half, it will grow at the far end). You probably meant QLinkedList but that's very rarely used as random access to a linked list is not possible so it is very slow for such cases.