Searching a QListWidget

[bl1nk]

I am trying to use a textbox that searches as you type. I have written some basic code that works perfect for smaller list, but not for big ones. I just connect this to the test edits changed signal. Is there anything I can do to speed this up?

QString searchText = ui->lineEdit->text();
int listWidgetSize = ui->listWidget->count();
 
for (int k1 = 0; k1 < listWidgetSize; k1++)
    {
    if (ui->listWidget->item(k1)->text().startsWith(searchText))
    {
         ui->listWidget->item(k1)->setHidden(false)
    }
    else
    {
         ui->listWidget->item(k1)->setHidden(true);
    }
}

QString searchText = ui->lineEdit->text();
int listWidgetSize = ui->listWidget->count();

for (int k1 = 0; k1 < listWidgetSize; k1++)
    {
    if (ui->listWidget->item(k1)->text().startsWith(searchText))
    {
         ui->listWidget->item(k1)->setHidden(false)
    }
    else
    {
         ui->listWidget->item(k1)->setHidden(true);
    }
}

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Thanks guys!