package com.danbrookes.main;

import java.util.ArrayList;
import processing.core.*;

public class Base extends PApplet {

	private static final long serialVersionUID = -7052994455601885135L;
	private ArrayList<TestObject> list = new ArrayList<TestObject>();
	private PApplet app = this;
	private int amount = 2500;
	private float rnd;
	private float ms;
	
	// main
	public static void main(String[] args) {
		PApplet.main(new String[] {Base.class.getName()});
	}
	
	// setup
	@Override
	public void setup() {
		size(640, 360);
		frameRate(60);
		fill(255, 128);
		strokeWeight(1);
		stroke(0, 128);
		textSize(48);
		smooth();
		for (int i = 0; i < amount; i++) {
			rnd = random(10);
			list.add(new TestObject(app, random(width), random(height), rnd, rnd));
		}
	}

	// draw
	@Override
	public void draw() {
		background(255);
		fill(0, 64);
		ms = millis();
		for (int i = 0; i < amount; i++) {
			list.get(i).setPos(list.get(i).getX() + random(-2,2), list.get(i).getY() + random(-2,2));
		}
		fill(255,0,0);
		text(millis() - ms + "", 10, 10, 200, 200);
	}
}

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

package com.danbrookes.main;

import processing.core.*;

public class TestObject {
	
	private PApplet pro;
	private float x;
	private float y;
	private float w;
	private float h;
	
	public TestObject(PApplet processing, float tX, float tY, float tW, float tH) {
		pro = processing;
		pro.registerDraw(this);
		x = tX;
		y = tY;
		w = tW;
		h = tH;
	}

	public void draw() {
		pro.ellipse(x, y, w, h);
	}
	
	public void setPos(float x, float y) {
		this.x = x;
		this.y = y;
	}
	
	public float getX() {
		return x;
	}

	public float getY() {
		return y;
	}

	public void setScale(float w, float h) {
		this.w = w;
		this.h = h;
	}
	
	public float getW() {
		return w;
	}

	public float getH() {
		return h;
	}
}