Android 3d game - laggy, bad performance

Hey,

currently I'm developing a game with touch controls (5 Gui-buttons) but sadly it's really laggy :/ Right now there aren't that many objects in my scene nor big textures nor crazy lightning (all materials are unlit)

There's a Screenshot of the Performance Profiler ↓

Obviously it has something to do with the touchbuttons

.

Update-function of the LocThroww.cs - Script:

 if (isPressed == true){
             guiTexture.color = Color.gray;
         }
         else{
             guiTexture.color = new Color(0.5f, 0.5f, 0.5f, 0.5f);
         }
         
         if (Screen.dpi != 0) {
             dpi = Screen.dpi * 0.000006f;
         }
         else{
             dpi = 1000;
         }
         guiTexture.pixelInset  = new Rect(- 105000 * dpi, 130000 * dpi, 100000 * dpi, 100000 * dpi);

.

My Touchmanagerscript if needed:

 using UnityEngine;
 using System.Collections;
 
 public class Touchmanager : MonoBehaviour {
 
     public static int currTouch = 0;//so other scripts can know what touch is currently on screen
     private Ray ray;//this will be the ray that we cast from our touch into the scene
     private RaycastHit rayHitInfo = new RaycastHit();//return the info of the object that was hit by the ray
     [HideInInspector]
     public int touch2Watch = 64;
     
     void Update () 
     {
         if(Input.touches.Length <= 0)
         {
             //if no touches then execute this code
         }
         else //if there is a touch
         {
             //loop through all the the touches on screen
             for(int i = 0; i < Input.touchCount; i++)
             {
                 currTouch = i;
                 Debug.Log(currTouch);
                 //executes this code for current touch (i) on screen
                 if(this.guiTexture.HitTest(Input.GetTouch(i).position)){
 
                     if(Input.GetTouch(i).phase == TouchPhase.Began)
                     {
                         this.SendMessage("OnTouchBegan");
                     }
                     if(Input.GetTouch(i).phase == TouchPhase.Ended)
                     {
                         this.SendMessage("OnTouchEnded");
                     }
                     if(Input.GetTouch(i).phase == TouchPhase.Moved)
                     {
                         this.SendMessage("OnTouchMoved");
                     }
                     if(Input.GetTouch(i).phase == TouchPhase.Stationary)
                     {
                         this.SendMessage("OnTouchStayed");
                     }
                     if(Input.GetTouch(i).phase == TouchPhase.Canceled)
                     {
                         this.SendMessage("OnTouchCanceled");
                     }
                 }
                 //outside so it doesn't require the touch to be over the guitexture
                 ray = Camera.mainCamera.ScreenPointToRay(Input.GetTouch(i).position);//creates ray from screen point position
                 switch(Input.GetTouch(i).phase)
                 {
                 case TouchPhase.Began:
                     //OnTouchBeganAnywhere();
                     this.SendMessage("OnTouchBeganAnyWhere");
                     if(Physics.Raycast(ray, out rayHitInfo))
                         rayHitInfo.transform.gameObject.SendMessage("OnTouchBegan3D");
                     break;
                 case TouchPhase.Ended:
                     //OnTouchEndedAnywhere();
                     this.SendMessage("OnTouchEndedAnywhere");
                     if(Physics.Raycast(ray, out rayHitInfo))
                         rayHitInfo.transform.gameObject.SendMessage("OnTouchEnded3D");
                     break;
                 case TouchPhase.Moved:
                     //OnTouchMovedAnywhere();
                     this.SendMessage("OnTouchMovedAnywhere");
                     if(Physics.Raycast(ray, out rayHitInfo))
                         rayHitInfo.transform.gameObject.SendMessage("OnTouchMoved3D");
                     break;
                 case TouchPhase.Stationary:
                     //OnTouchStayedAnywhere();
                     this.SendMessage("OnTouchStayedAnywhere");
                     if(Physics.Raycast(ray, out rayHitInfo))
                         rayHitInfo.transform.gameObject.SendMessage("OnTouchStayed3D");
                     break;
                 }
             }
         }
     }
 }

.

I'd be really really happy if someone could help me with my problem :/

thanks in advance :)