Ticket #15170: simplifyway.patch

src/org/openstreetmap/josm/actions/SimplifyWayAction.java

@@ -208 +208 @@
             }
         }
 
-        Set<Node> delNodes = new HashSet<>();
-        delNodes.addAll(w.getNodes());
-        delNodes.removeAll(newNodes);
+        // workaround for slow AbstractSet.removeAll
+                Set<Node> delNodes = new HashSet<>(w.getNodes());
+                for (Node n : newNodes) {
+                        delNodes.remove(n);
+                }
+
 
-        if (delNodes.isEmpty()) return null;
+                if (delNodes.isEmpty()) return null;
 
         Collection<Command> cmds = new LinkedList<>();
         Way newWay = new Way(w);