Hi All,

I'm quite new to processing. More used to working with xCode and Objective-C. I noticed my laptop Fan comes on and my CPU usage goes up to 69% or more everytime I run the following sketch:

1. //random drawing
   
   import processing.serial.*;
   Serial port;
   
   float velocity;
   float val;
   float x;
   float y;
   int diameter = 10;
   
   
   void setup()
   {
     size(1120, 800);
     x = width/2;
     y = height/2;
     background(255,30,30);
    
     String arduinoPort = Serial.list()[0];
     port = new Serial(this, arduinoPort, 9600);
   }
   
   
   void draw()
   {
     smooth();
     frameRate(30);
    float value = brightness((int)random(255));
     fill(value);
    
      //If data is available...
     if (port.available() >0)
     {
       //Read it and store it in the variable val...
       val = port.read();
       velocity = val/20;
       // convert it to a value using the map function
     }
    
    
     x+= random(-velocity, velocity);
     y+= random(-velocity, velocity);
    
     x=constrain(x,0,width);
     y=constrain(y,0,height);
    
     ellipse(x,y,diameter,diameter);
    
   }
   

To my mind this is quite a straight forward bit of script, yet my CPU usage is running around 69% compared to about 5% normally. I read this thread on a similar problem:
https://forum.processing.org/topic/absurd-java-cpu-usage-at-empty-sketch-with-draw

What I couldn't gather from this thread was if the high CPU usage would damage the machine? I'm guessing it's not good for it. Can anyone tell me? Also is there a way to manage CPU usage by the program from within the script?

Thanks!