Hello every body,
I am using QAbstractTableModel to represent more than 4000,000 record, when I scroll down the view to the end the application size is increased in the memory from 50 MB to 111 MB.
Qt Code: 
  1. QVariant SearchModel::data(const QModelIndex &index, int role) const
  2. {
  3.     if(!index.isValid())
  4.         return QVariant();
  5.     switch(role)
  6.     {
  7.     case Qt::DisplayRole:
  8.         {
  9.             switch(index.column())
  10.             {
  11.             case 0: // serial
  12.                 {
  13.                     return index.row()+1;
  14.                 }
  15.                 break;
  16.             case 1: // text
  17.                 {
  18.                     return m_pSearchEngine->getHighlightedText(index.row(), false);
  19.                 }
  20.                 break;
  21.             case 2: // book name
  22.                 {
  23.                     return m_pSearchEngine->getBookName(index.row());
  24.                 }
  25.                 break;
  26.             case 3:
  27.                 {
  28.                     return m_pSearchEngine->getTitle(index.row());
  29.                 }
  30.                 break;
  31.             case 4: // part no
  32.                 return m_pSearchEngine->getPartNo(index.row());
  33.                 break;
  34.             case 5: // page no
  35.                 return m_pSearchEngine->getPageNo(index.row());
  36.                 break;
  37.             }
  38.         }
  39.         break;
  40.     }
  41.     return QVariant();
  42. }
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I examined the functions I used it just return strings.
How can I decrease the amount of memory that the model take?
Thank you