const QByteArray SEP = ": ";
const QByteArray NEWLINE = "\r\n";

QMap<QString, QString> m_Values;

void QAmiPropertyMap::convertStr(const QByteArray &str)
{
    QStringList lines = QString(str).split(NEWLINE);
    for(const auto &s : lines) {
        int cutAt = s.indexOf(SEP);
        QStringRef key = s.leftRef(cutAt);
        QStringRef value = s.rightRef(s.length() - cutAt - SEP.length());
        //qDebug() << "KEY: "<< key << " VALUE: "<<value;
        m_Values.insert(*key.string(), *value.string());
    }
}

Elapsed time:    427 ms
One cycle:   1.423333 ms
Create item:     0.006590 ms
Items:      216
Create count (300x216): 64800