Understanding why these few lines are slow

[Sven]

Try this :

QList<QUrl> urlList = event->mimeData()->urls();
 
for (QList<QUrl>::const_iterator i = urlList.begin();
   i != urlList.end();
   i++)
{
   QString strFile2 = (*i).toString();
   if (strFile2.endsWith(".png") || strFile2.endsWith(".gif")) {
      QString strFile1 = strFile2.mid(7, strFile2.length() - 2);
      ui->listWidget->addItem(strFile1);
   }
}

QList<QUrl> urlList = event->mimeData()->urls();

for (QList<QUrl>::const_iterator i = urlList.begin();
   i != urlList.end();
   i++)
{
   QString strFile2 = (*i).toString();
   if (strFile2.endsWith(".png") || strFile2.endsWith(".gif")) {
      QString strFile1 = strFile2.mid(7, strFile2.length() - 2);
      ui->listWidget->addItem(strFile1);
   }
}

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