i made something similar a while ago, just without your last rotate step... i reduced it alot maybe its a good point to start...

import processing.opengl.*;


Spot[]  spots = new Spot[1];

float distance =            10.0;                
float durchmesser=            5 ;              

void setup(){
 size(690,480,OPENGL);
 // size(1200,900,OPENGL);
 frameRate(55);
 background( 255);
 smooth();
 spots[0] = new Spot(width/2,height/2);
}

void draw(){
 background(255);
 randomSeed(0);
 



 spots[0].display();

}

class Spot{
 float x, y;
 int resolution;
 int start;
 int end;
 int helixRadius;

 Spot(float xpos, float ypos){
   x=xpos;
   y=ypos;

   resolution = 120;
   start = 0;
   end = 1480;
   helixRadius = 50;

 }

 /////////////////////////////////////DISPLAY CLASS///////////////////////////////////
 void display(){

  pushMatrix();

 translate(x,y-700,-2000);
 rotateZ(5);
 rotateY(-2);
 
 
 beginShape(QUAD_STRIP);

   for(int i=0;i<resolution;i++){
     float d=radians(map(i,0,resolution-1,start,end));

     fill(map(i,0,resolution,0,255));
     float xx = random(1.2,1.5);


     vertex(sin(d)*(helixRadius+i*durchmesser),cos(d)*(helixRadius+i*durchmesser),  i*distance);
     vertex(sin(d)*((helixRadius*(random(10 )))+i*durchmesser),cos(d)*((helixRadius*(random(10 )))+i*durchmesser),  i*distance);
   }
   endShape();

   popMatrix();
 }
}