Slow component removal

import java.awt.BorderLayout;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;

import javax.swing.AbstractAction;
import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;


public class SSCCE extends JApplet {
    private boolean state;

    public void init() {
        super.init();
        getContentPane().add(setupSwitchPanel(), BorderLayout.NORTH);
        getContentPane().add(setupSimplePanel(), BorderLayout.CENTER);
    }

    private JPanel setupSwitchPanel() {
        JPanel switchPanel = new JPanel();
        switchPanel.add(new JButton(new AbstractAction("Switch panels (slow)") {
            @Override
            public void actionPerformed(ActionEvent arg0) {
                switchComponents();
            }
        }));

        switchPanel.add(new JButton(new AbstractAction("Switch panels (fast)") {
            @Override
            public void actionPerformed(ActionEvent arg0) {
                ((JPanel)getContentPane().getComponent(1)).removeAll();
                switchComponents();
            }
        }));
        return switchPanel;
    }

    private void switchComponents() {
        getContentPane().remove(1);
        if (state)
            getContentPane().add(setupSimplePanel(), BorderLayout.CENTER);
        else
            getContentPane().add(setupComplexPanel(), BorderLayout.CENTER);
        state = !state;
        getContentPane().validate();
    }

    private JPanel setupComplexPanel() {
        JPanel contents = new JPanel();
        contents.setLayout(new GridBagLayout());
        GridBagConstraints c = new GridBagConstraints();
        for (int x = 0; x<10; x++) {
            c.gridx = x;
            for (int y = 0; y<10; y++) {
                c.gridy = y;
                contents.add(new JLabel(x + ", " + y), c);
            }
        }
        return contents;
    }

    private JPanel setupSimplePanel() {
        JPanel contents = new JPanel();
        contents.add(new JLabel("Simple view"));
        return contents;
    }
}