Displays the slowest tests

def report(self, stream):
        """Displays the slowest tests"""
        self.db.commit()

        stream.writeln()
        self.draw_header(stream, "10 SLOWEST SETUPS")
        self.display_slowest_setups(stream)

        stream.writeln()
        self.draw_header(stream, "10 SLOWEST TESTS")
        self.display_slowest_tests(stream)
        stream.writeln()

        if self.html_output_file:
            HtmlReport.write(self.html_output_file)