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c++qtcopyqfile

QFile copy - static vs temporary object

Next two strings of Qt C++ code do the same stuff and without any problems to me. 

QFile(source).copy(destination); 
QFile::copy(source, destination);

The question is about performance of first and second. Does code of Qt optimised inside static method and doesn't it create two objects? Which one is better and etc.

Solution

  • From Qt 5.5.1:

    bool  QFile::copy(const QString &fileName, const QString &newName)
{
    return QFile(fileName).copy(newName);
}

    Hope that give's you an idea =)