qint64 start,end; start = QDateTime::currentMSecsSinceEpoch(); //!do something end = QDateTime::currentMSecsSinceEpoch(); qDebug() << "用时(毫秒):" << end - start ;
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qint64 start,end; start = QDateTime::currentMSecsSinceEpoch(); //!do something end = QDateTime::currentMSecsSinceEpoch(); qDebug() << "用时(毫秒):" << end - start ;