QList Erasing Benchmark

#include <QObject>
#include <QTest>

class QObjectBenchmark : public QObject
{
    Q_OBJECT
private slots:
    void qlist_clean_zero_data();
    void qlist_clean_zero();

    void qlist_clean_takeFirst_data();
    void qlist_clean_takeFirst();
};

void QObjectBenchmark::qlist_clean_zero_data()
{
    QTest::addColumn<QList<int>>("list");

    QList<int> childrenCount;
    childrenCount << 10000 << 100000 << 1000000 << 10000000;

    foreach (const int count, childrenCount) {
        QList<int> list;
        for (int i = 0; i < count; ++i)
            list << 0;
        QTest::newRow(qPrintable(QString::number(count) + " children")) << list;
    }
}

void QObjectBenchmark::qlist_clean_zero()
{
    QFETCH(QList<int>, list);
    QBENCHMARK {
        for (int i = 0; i < list.count(); ++i) {
            list[i] = 0;
        }
        list.clear();
    }
}

void QObjectBenchmark::qlist_clean_takeFirst_data()
{
    QTest::addColumn<QList<int>>("list");

    QList<int> childrenCount;
    childrenCount << 10000 << 100000 << 1000000 << 10000000;

    foreach (const int count, childrenCount) {
        QList<int> list;
        for (int i = 0; i < count; ++i)
            list << 0;
        QTest::newRow(qPrintable(QString::number(count) + " children")) << list;
    }
}

void QObjectBenchmark::qlist_clean_takeFirst()
{
    QFETCH(QList<int>, list);
    QBENCHMARK {
        while (!list.isEmpty())
            list.takeFirst();
    }
}

QTEST_MAIN(QObjectBenchmark)

#include "main.moc"