I write an app need to load lots of images to preform 3D view.

When I load a lot of different images into the app, the app become really slow. After I profile this app, I find out when I add a 7M image into my app, the Total memory cost will increase about 100M.

So here I changed the simple code from ORACLE to do some test : http://docs.oracle.com/javase/8/javafx/graphics-tutorial/sampleapp3d.htm.

My changed code is in MoleculeSampleApp.java:
    ---------------------------------------------------------------------------------------------
private void buildMolecule() throws FileNotFoundException, IOException {
       //------------------------------------ I load three big images here------------------
        String path1 = "large1.jpg";
        String path2 = "large2.jpg";
        String path3 = "large3.jpg";
        InputStream stream1 = new FileInputStream(path1);
        Image image1 = new Image(stream1);
        stream1.close();
        InputStream stream2 = new FileInputStream(path2);
        Image image2 = new Image(stream2);
        stream2.close();
        InputStream stream3 = new FileInputStream(path3);
        Image image3 = new Image(stream3);
        stream3.close();
        //---------------------------------------------------------------------------
        
       final PhongMaterial redMaterial = new PhongMaterial();
        redMaterial.setDiffuseColor(Color.DARKRED);
        redMaterial.setSpecularColor(Color.RED);
        // Add image1 to redMeterial
        redMaterial.setSpecularMap(image1);
 

        final PhongMaterial whiteMaterial = new PhongMaterial();
        whiteMaterial.setDiffuseColor(Color.WHITE);
        whiteMaterial.setSpecularColor(Color.LIGHTBLUE);
        //Add image2 to whiteMaterial
        whiteMaterial.setSpecularMap(image2);
        
        final PhongMaterial greyMaterial = new PhongMaterial();
        greyMaterial.setDiffuseColor(Color.DARKGREY);
        greyMaterial.setSpecularColor(Color.GREY);
        //Add image3 to greyMaterial
        greyMaterial.setSpecularMap(image3);
        ...........................

-----------------------------------------------------------------------------------

Each of the images is about 14M.

Then I begin to profile the code with the profile tool in NetBeans.

First
I comment these three lines and profile the code:
redMaterial.setSpecularMap(image1);
whiteMaterial.setSpecularMap(image2);
greyMaterial.setSpecularMap(image3);

The Total Memroy cost is 49M and Used Memroy is 8M.
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Second
I comment two lines and profile the code :
whiteMaterial.setSpecularMap(image2);
greyMaterial.setSpecularMap(image3);

image1 is 13.2M

The Total Memroy cost is 283M and Used Memroy is 236M.
**********************************************************************

Third
I comment one line and profile the code:
greyMaterial.setSpecularMap(image3);

image1 and image2 together is 26.9M

The Total Memroy cost is 550M and Used Memroy is 502M.

**********************************************************************

Fourth
I profile the code and three images are all added to each node.

The three images is 44.5M

The Total Memroy cost is 696 and Used Memroy is 650M.

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Also after adding the images, the camera moving and zooming will not work as smoothly as the one without set images(app slow).

I don't know whether this is normal for the 3D things. But adding images to JAVAFX codes will cost too much space and slow down the application.