JavaFX Canvas Rendering Performance - performance

Question

I work on a JavaFX application and have to draw a lot (4000) of arc's.
I'm using the JavaFX Canvas method strokeArc of the graphic context.
The application performs very weak, but not the calls of the methods strokeArc, I think the delay occurs later, maybe at the rendering.
The results is, that the application does take a delay about 5 seconds to show the arc's on the gui.
Is there a faster way to draw the arc's in JavaFX?

Answer 1

No, there isn't. Canvas is the fastest.
You didn't provide a MCVE. I just tried a simple application. Works pretty fast, 4000 arcs drawn in 6ms. The application window shows up immediately. Here's the code:
import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.canvas.Canvas;
import javafx.scene.canvas.GraphicsContext;
import javafx.scene.paint.Color;
import javafx.scene.shape.ArcType;
import javafx.stage.Stage;
public class ArcTest extends Application {
public static void main(String[] args) {
launch(args);
}
#Override
public void start(Stage primaryStage) {
Group root = new Group();
Canvas canvas = new Canvas(300, 250);
GraphicsContext gc = canvas.getGraphicsContext2D();
root.getChildren().add(canvas);
primaryStage.setScene(new Scene(root));
primaryStage.show();
drawShapes(gc);
}
private void drawShapes(GraphicsContext gc) {
long time = System.currentTimeMillis();
gc.setFill(Color.GREEN);
gc.setStroke(Color.BLUE);
gc.setLineWidth(5);
for( int i=0; i < 4000; i++) {
gc.strokeArc(10, 160, 30, 30, 45, 240, ArcType.OPEN);
}
System.out.println( System.currentTimeMillis() - time);
}
}
Unless you provide some code with more information (BlendMode, etc) it's hard to help you.