ADDITIONAL SYSTEM INFORMATION :
OS Build number: macOS 12.6.1 (21G217)
Memory Usage: 522 MB / 4096 MB (195 MB allocated, but free)
Java version: 17.0.5+8, Eclipse Adoptium, OpenJDK 64-Bit Server VM (also verified on Java 19 with attached source)
Look and Feel: com.apple.laf.AquaLookAndFeel
Screen: Display 188945233 1920×1080 (scaling 1.00×1.00) Display 188945231 1920×1080 (scaling 1.00×1.00) Display 69733382 1680×1050 (scaling 2.00×2.00)
Maximum Screen Size: 1920×1080

A DESCRIPTION OF THE PROBLEM :
Please add label "josm-found" to this bug report.

This requires the application to be using the screen menu bar (`apple.laf.useScreenMenuBar`).

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Start JOSM ( available at https://josm.openstreetmap.de/josm-tested.jar )
2. Open JOSM Preferences (`JOSM` -> `Preferences`)
3. Go to `Tagging Presets` (looks like a tag, should be third from the bottom of the tabbed list)
4. Search for `Name Suggestion Index` and enable it (blue right arrow)
5. Press `OK`
6. Wait a second for preferences to close
7. Click on `Presets` in the main menu bar.
8. Come back in 20 minutes, once processing is finished

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
<5s pause (Metal LaF on a Raspberry Pi 4)
ACTUAL -
~20 minutes of an application UI freeze.
From profiling (async profiler), 94%+ of the time spent during this freeze was in `com.apple.laf.ScreenMenu.invokeOpenLater()`.

---- Stack trace from profiler (94.21% of all) ----
__CFRunLoopRun
CFRunLoopRunSpecific
-[NSRunLoop(NSRunLoop) runMode:beforeDate:]
Java_sun_lwawt_macosx_LWCToolkit_doAWTRunLoopImpl
sun.lwawt.macosx.LWCToolkit.doAWTRunLoopImpl(long, boolean, boolean)
sun.lwawt.macosx.LWCToolkit.doAWTRunLoop(long, boolean)
sun.lwawt.macosx.LWCToolkit.invokeAndWait(Runnable, Component)
com.apple.laf.ScreenMenu.invokeOpenLater()

---------- BEGIN SOURCE ----------
import java.awt.event.ActionEvent;

import javax.swing.AbstractAction;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;

class Scratch {
    public static void main(String[] args) {
        // Set this to different values to see the difference
        int jMenuItemsToMake = 20_000;
        // Set this to true/false to see the difference. `true` is needed to see the bug.
        System.setProperty("apple.laf.useScreenMenuBar", "true");
        System.setProperty("apple.awt.application.name", "Test");
        JFrame frame = new JFrame("test");
        JMenuBar menuBar = new JMenuBar();
        JButton exit = new JButton(new AbstractAction() {
            @Override
            public void actionPerformed(ActionEvent e) {
                System.exit(0);
            }
        });
        exit.setText("Exit");
        menuBar.add(exit);
        frame.setJMenuBar(menuBar);
        frame.setVisible(true);
        JMenu mainMenu = new JMenu("Test many items");
        menuBar.add(mainMenu);
        for (int i = 0; i < jMenuItemsToMake; i++) {
            mainMenu.add(new JMenuItem("Test " + i));
        }
    }
}
---------- END SOURCE ----------

FREQUENCY : always