QTableView sort column with numbers very slow

[aguayro]

the list of games is a QStringList like name;language;path;etc... so i use section() to get each column data.

About profiling i'm not sure what it means, i'll google for it (i'm newbie in programming in general)
I'll try anything, this problem is killing me. Maybe Qt can't sort 15.000 rows in < 1 second?

EDIT: i did it (at leas that seems), the problem was the section()

[wysota]

How did you solve it?

[aguayro]

My model was working wit a QStringList, each QString was a row, Name;Type;Company;etc... then i was using section() to get the data for each row cell. I've replaced the QStringList with QList<QStrngList>, i didn't know that section() were too slow, but with QList<QStringList> and using just MyListQSList.at(index.row()).at( column-nuber ) is very fast, just instantly:

QVariant rs_GameModel::data(const QModelIndex &index, int role) const { ////////////////////////////////////////////////////////////        DATA
    if (!index.isValid()) {
        return QVariant();
    }
    if (index.row() >= romCount || index.row() < 0 ) {
        return QVariant();
    }
 
    if (role == Qt::TextAlignmentRole) {
        if (index.column() > 0 && index.column() < 10) {
            return  Qt::AlignHCenter;
        }
 
    }
    if (role == Qt::UserRole) {
        if (index.column() == 0) {
            return QString("%1;%2;%3").arg(ROMs.at(index.row()).at(12)).arg(ROMs.at(index.row()).at(14)).arg(ROMs.at(index.row()).at(15));
        }
        if (index.column() == 3) {
            ROMs.at(index.row()).at(11);
        }
 
    }
    if (role == Qt::DecorationRole) {
        if (index.column() == 0) {
            return romicon;
        }
        if (index.column() == 2) {
            return QPixmap(QString("Skin/%1/icons/sys/rate%1.png").arg(CurrSkin));
        }
 
    }
    if (role == Qt::DisplayRole) {
        if (index.column() == 0) {
            return  ROMs.at(index.row()).at(0);
        }
        if (index.column() == 3) {
            if (ROMs.at(index.row()).at(3) != "rsnull") {
            return  ROMs.at(index.row()).at(3);
              } else {
                return cEmulator;
              }
        }
        if (index.column() == 4) {
            return  ROMs.at(index.row()).at(4);
        }
        if (index.column() == 5) {
            return  ROMs.at(index.row()).at(5);
        }
        if (index.column() == 6) {
            return  ROMs.at(index.row()).at(6);
        }
        if (index.column() == 7) {
            return  ROMs.at(index.row()).at(7);
        }
        if (index.column() == 8) {
            return  ROMs.at(index.row()).at(8);
        }
        if (index.column() == 9) {
            return  ROMs.at(index.row()).at(9);
        }
        if (index.column() == 11) {
            return  ROMs.at(index.row()).at(10);
        }
 
    }
 
    return QVariant();
}

QVariant rs_GameModel::data(const QModelIndex &index, int role) const { ////////////////////////////////////////////////////////////        DATA
    if (!index.isValid()) {
        return QVariant();
    }
    if (index.row() >= romCount || index.row() < 0 ) {
        return QVariant();
    }

    if (role == Qt::TextAlignmentRole) {
        if (index.column() > 0 && index.column() < 10) {
            return  Qt::AlignHCenter;
        }

    }
    if (role == Qt::UserRole) {
        if (index.column() == 0) {
            return QString("%1;%2;%3").arg(ROMs.at(index.row()).at(12)).arg(ROMs.at(index.row()).at(14)).arg(ROMs.at(index.row()).at(15));
        }
        if (index.column() == 3) {
            ROMs.at(index.row()).at(11);
        }

    }
    if (role == Qt::DecorationRole) {
        if (index.column() == 0) {
            return romicon;
        }
        if (index.column() == 2) {
            return QPixmap(QString("Skin/%1/icons/sys/rate%1.png").arg(CurrSkin));
        }

    }
    if (role == Qt::DisplayRole) {
        if (index.column() == 0) {
            return  ROMs.at(index.row()).at(0);
        }
        if (index.column() == 3) {
            if (ROMs.at(index.row()).at(3) != "rsnull") {
            return  ROMs.at(index.row()).at(3);
              } else {
                return cEmulator;
              }
        }
        if (index.column() == 4) {
            return  ROMs.at(index.row()).at(4);
        }
        if (index.column() == 5) {
            return  ROMs.at(index.row()).at(5);
        }
        if (index.column() == 6) {
            return  ROMs.at(index.row()).at(6);
        }
        if (index.column() == 7) {
            return  ROMs.at(index.row()).at(7);
        }
        if (index.column() == 8) {
            return  ROMs.at(index.row()).at(8);
        }
        if (index.column() == 9) {
            return  ROMs.at(index.row()).at(9);
        }
        if (index.column() == 11) {
            return  ROMs.at(index.row()).at(10);
        }

    }

    return QVariant();
}

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I suposse will discover what is fast and what is slow in qt with the time, and programmng wit it

[Lesiok]

Qt has nothing to do so. In every language search string section will take longer than getting the item from list or array.