RelationList dialog causes very severe performance issues

[nyurik]

In file josm/core/src/org/openstreetmap/josm/gui/dialogs/RelationListDialog.java line 151:

displaylist.addListSelectionListener(e -> updateActionsRelationLists());

Whenever I try to fetch Wikidata IDs for a large set of relations, JOSM freezes, sometimes for hours, with 100% CPU on a single thread. Debugging showed that all the work is being done in the above function. If I close the RelationList dialog, it finishes in seconds. I tried it in 11362 (svn build)

Repo: Install wikipedia plugin, and get 1000+ objects using this query. Select all relations, and "fetch Wikidata IDs" (Data menu).

[out:xml][timeout:50];
(
    relation["wikipedia"]({{bbox}});
);
out meta;

[skyper]

Thanks for your report, however your ticket is incomplete and therefore not helpful in its current form.

Please add all needed information according to this list:

• The required parts of the Status Report from your JOSM.
  • Please, use Report Bug from Help menu and copy & paste.
• Describe what behaviour you expected.
• Describe what did happen instead.
• Describe if and how the issue is reproducible.
• Add any relevant information like error messages or screenshots.

To ensure that all technical relevant information is contained, create new tickets by clicking in JOSMs Main Menu on Help → Report Bug.

Remember: This is a generic notice so we don't need to write the same stuff again and again. It may only apply in parts to the specific case!

[Don-vip]

@skyper: there's enough information in this bug report.

[Don-vip]

In 11365/josm:

fix #14090 - use DefaultListSelectionModel adjusting selection mode to avoid too much costly listener calls

[skyper]

Replying to Don-vip:

@skyper: there's enough information in this bug report.

Sorry, next time I will not touch a ticket like this. I was not sure if the OS and java version are important.

[Don-vip]

Milestone renamed