Index: trunk/native/windows/win-jpackage.sh
===================================================================
--- trunk/native/windows/win-jpackage.sh	(revision 19051)
+++ trunk/native/windows/win-jpackage.sh	(revision 19215)
@@ -52,4 +52,6 @@
     --main-class org.openstreetmap.josm.gui.MainApplication \
     --icon ./native/windows/logo.ico --type $type --dest app \
+    --java-options "-XX:MaxRAMPercentage=75.0" \
+    --java-options "-Xms256m" \
     --java-options "--add-modules java.scripting,java.sql,javafx.controls,javafx.media,javafx.swing,javafx.web" \
     --java-options "--add-exports=java.base/sun.security.action=ALL-UNNAMED" \