I think you should move your data loading part ("//  Load Data and save it as Array")  from draw() to setup(), otherwise you repeat file access in every drawn frame, resulting in the slowdown.

thank you for this fast reply. i thought about this but i didn‘t find out how to initialize the array in setup() and access it in draw()

i tried the following:

1. String []landerDaten; //country Data
   String []landerNamen;
   float []landerWerte;
   
   void setup()
   {
     size(500, 300); //
     int hohenabstand=height/30;
    
     ///////////////////////////////////////////////////////////////////////////
     //Load Data and save it as Array
     /////////////////////////////////////////////////////////////////////////////
     String []landerDaten; //country Data
     landerDaten = loadStrings("daten.txt");//or dateiName
     float []landerWerte= new float[landerDaten.length];
     String []landerNamen= new String[landerDaten.length];
     for (int i=0; i<landerDaten.length; i++) {
       String [] list  = split(landerDaten[i], ";"); //split data into country-Names (landerNamen) and country-values(landerWerte)
       landerNamen[i]=list[0];//fill
       float f = float(list[1]);//convert float data into integer
       f=height-(f*(height-2*hohenabstand)/100)-hohenabstand; //make data fit into percentage axis
       landerWerte[i]=f; //fill DatenArray
     }
   }
   
   void draw()
   {
   
   
     int optionAindex=int(random(landerDaten.length)); 
     int optionBindex=int(random(landerDaten.length)); 
     int optionCindex=int(random(landerDaten.length));
   
     String optionA = landerNamen[optionAindex];
     String optionB = landerNamen[optionBindex];
     String optionC = landerNamen[optionCindex];
   }

By using the String[] and float[] in the setup, you're redefining them as local variables.  Don't redefine them, just use the global ones you already defined.

1. String []landerDaten; //country Data
2. String []landerNamen;
3. float []landerWerte;
4. void setup()
5. {
6.   size(500, 300); //
7.   int hohenabstand=height/30;
8.  
9.   ///////////////////////////////////////////////////////////////////////////
10.   //Load Data and save it as Array
11.   /////////////////////////////////////////////////////////////////////////////
12.   landerDaten = loadStrings("daten.txt");//or dateiName
13.   landerWerte= new float[landerDaten.length];
14.   landerNamen= new String[landerDaten.length];
15.   for (int i=0; i<landerDaten.length; i++) {
16.         String [] list  = split(landerDaten[i], ";");
    
17.         landerNamen[i]=list[0];//fill
18.         float f = float(list[1]);//convert float data into integer
19.         f=height-(f*(height-2*hohenabstand)/100)-hohenabstand; //make data fit into percentage axis
20.         landerWerte[i]=f; //fill DatenArray
21.    }
    
22. }
    

I'll also note that it might make better sense if landerDaten was local to setup.  Since it is only used in the draw for length, you could use one of the other global arrays, since they're the same length.  Or define the length as a global integer.  That would free up the memory that landerDaten is unnecessarily using.

hello again,
first of all thank you all for your answers and sorry for not answering my own thread for so long.
I did what you said and its working a little better but not as  good as I would like it to. Now the javascript version  is not flickering but still slow ( http://www.unet.univie.ac.at/~a0406222/prozent/game.html) and Firefox is still consuming about 380MB of memory and depending how many choices the user makes up to 100 percent of CPU.

Another strange thing is that the android version doesn't work that way. The application crashes and the processing window on my computer shows me a Nullpointer exception. So here my questions

1. Whats wrong with the android version. Could this be a bug?

2. What else can I do to make the game faster. Could it help to reduce the yPos[] array which is now 2 times the screen width to 1*screenWidth . I did it this way because if not the last line between the left screenside an the first "node" dissappears. So reducing the array size I would have to simulate a node for the leftest screen xPosition.

3. is it posible to store NULL in the array if the user has not made a choice to make the array slimmer?

1. A bug, yes, in your code... We can't guess the error message, so you should show it. If you can show which line has the exception, it can help too.
2. You have a couple of createFont() in draw. Although it can be fast in Java2D mode, you still should declare both fonts at the global level and create them in setup().
3. You can store null in an array of objects, but it won't make the array slimmer (smaller). But it can free some memory if the stored object you nullify is big.

hello again,

1. :) (for some reason I told you Im a beginner. as well as it comes asking questions in this area  )
so here is the error message I get:

1. The file "daten.txt" is missing or inaccessible, make sure the URL is valid or that the file has been added to your sketch and is readable.
   FATAL EXCEPTION: Animation Thread
   java.lang.NullPointerException
       at processing.android.test.nuline_dec22_android.nuline_dec22_android.setup(nuline_dec22_android.java:65)
       at processing.core.PApplet.handleDraw(PApplet.java:1783)
       at processing.core.PGraphicsAndroid2D.requestDraw(PGraphicsAndroid2D.java:161)
       at processing.core.PApplet.run(PApplet.java:1674)
       at java.lang.Thread.run(Thread.java:1102)