Slows down JOSM when working with a lot of data

[naoliv]

While working with a lot of data it's possible to see that JOSM gets really slow to basically do anything (even adding a simple node and some tags to it).

While profiling with visualvm I can see that the wikipedia plugins is using some considerable amount of CPU time:

From my ignorance, it seems that it's recalculating/updating something for every map change (which contributes for the general slowness), although I have not modified anything with a wikipedia/wikidata tag:

    @Override
    public void processDatasetEvent(AbstractDatasetChangedEvent event) {
        updateWikipediaArticles();
        list.repaint();
    }

Can this be improved somehow, please?

JOSM:

Relative:URL: ^/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2018-08-29 23:16:52 +0200 (Wed, 29 Aug 2018)
Revision:14204
Build-Date:2018-08-30 01:32:31
URL:https://josm.openstreetmap.de/svn/trunk

Identification: JOSM/1.5 (14204 en) Linux Debian GNU/Linux testing (buster)
Memory Usage: 7168 MB / 7168 MB (5227 MB allocated, but free)
Java version: 10.0.2+13-Debian-1, Oracle Corporation, OpenJDK 64-Bit Server VM
Screen: :0.0 1600x900, :0.1 1280x1024
Maximum Screen Size: 1600x1024
Java package: openjdk-10-jre:amd64-10.0.2+13-1
Java ATK Wrapper package: libatk-wrapper-java:all-0.33.3-21
VM arguments: [--add-modules=java.activation,java.se.ee, -Dawt.useSystemAAFontSettings=gasp]
Program arguments: [--language=en]
Dataset consistency test: No problems found

Plugins:
+ ImportImagePlugin (34576)
+ OpeningHoursEditor (34535)
+ PicLayer (34544)
+ SimplifyArea (34586)
+ apache-commons (34506)
+ buildings_tools (34572)
+ download_along (34503)
+ editgpx (34506)
+ ejml (34389)
+ geojson (87)
+ geotools (34513)
+ jts (34524)
+ log4j (34527)
+ measurement (34529)
+ opendata (34576)
+ pbf (34576)
+ poly (34546)
+ reverter (34552)
+ scripting (30787)
+ tageditor (34560)
+ todo (30305)
+ turnlanes-tagging (272)
+ turnrestrictions (34576)
+ undelete (34568)
+ utilsplugin2 (34506)
+ wikipedia (v1.1.0)

[simon04]

​https://github.com/JOSM/wikipedia/commit/687142d4154d2307bb13ced19f727efba55b8e86 – Filter relevant DatasetChangedEvents

[taylor.smock]

I think this is fixed as of v1.1.1 (see ​https://github.com/JOSM/wikipedia/commit/92c2aa65dccf2ca156ff422b84655319bdf632df ).