SurfaceView wird sehr unregelmäßg geupdated

    @Override
    public void run(){
        //super.run();
        Canvas can = this.holder.lockCanvas();
        Renderer renderer = new Renderer(new Scene(), can, new Vector3D(0.0f, 0.0f, 10.0f),6);
        this.holder.unlockCanvasAndPost(can);
        this.renderer = renderer;
        while(running){
            Canvas canvas = this.holder.lockCanvas();
            renderer.canvas = canvas;
            renderer.RenderOneStep();
            this.holder.unlockCanvasAndPost(renderer.DisplayResult());
        }
    }

        while(locker) {
            if (this.holder.getSurface().isValid()) {
                MyThread myThread = new MyThread(this.holder);
                myThread.start();

                this.runningThread = myThread;

                locker = false;
            }
        }