FULL PRODUCT VERSION :
java version "9.0.4"
Java(TM) SE Runtime Environment (build 9.0.4+11)
Java HotSpot(TM) 64-Bit Server VM (build 9.0.4+11, mixed mode)


A DESCRIPTION OF THE PROBLEM :
Create a TableView with 50000 items and call selectAll.
The call does not finish on my system.


REGRESSION. Last worked in version 8u161

ADDITIONAL REGRESSION INFORMATION:
java version "1.8.0_161"
Java(TM) SE Runtime Environment (build 1.8.0_161-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.161-b12, mixed mode)


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
run the sample code

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Output:
"item count 50000 took XXms"

where XX < 100ms


ACTUAL -
Code does not finish for 50000 items.
It is very slow for 10000 items.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import static javafx.scene.control.SelectionMode.MULTIPLE;

import javafx.application.Application;
import javafx.application.Platform;
import javafx.beans.property.SimpleObjectProperty;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.Scene;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.layout.HBox;
import javafx.stage.Stage;


public class Main2 extends Application {

final ObservableList<SimpleObjectProperty<Integer>> listitems = FXCollections.observableArrayList();
private static int ITEM_COUNT = 50000;

public Main2() {
for (int i = 0; i < ITEM_COUNT; ++i) {
listitems.add(new SimpleObjectProperty<>(i));
}
}

@Override
public void start(Stage primaryStage) {
final TableView<SimpleObjectProperty<Integer>> lv = new TableView<>();
final TableColumn<SimpleObjectProperty<Integer>, Integer> c = new TableColumn<>();
c.setCellValueFactory(TableColumn.CellDataFeatures::getValue);
lv.getColumns().add(c);
lv.setItems(listitems);

final HBox hbox = new HBox();
hbox.getChildren().add(lv);
primaryStage.setScene(new Scene(hbox));

lv.getSelectionModel().setSelectionMode(MULTIPLE);

primaryStage.show();
Platform.runLater(() -> {
long startMillis = System.currentTimeMillis();
lv.getSelectionModel().selectAll();
System.out.println("item count " + ITEM_COUNT + " took " + (System.currentTimeMillis() - startMillis));
System.exit(1);
});
}

public static void main(String[] args) {
Application.launch(args);
}
}

---------- END SOURCE ----------