Horrible Lag spike when Looking at an object that's showing GUI

[Vid-Maddness]

I have a battery pickup script that shows the text “Press E to pickup” when your looking at it. But for some reason it causes horrible lag and i don’t know why.
Here’s the code. C#

using UnityEngine;
using System.Collections;

public class battries : MonoBehaviour {

    public float a;
    public float b;
    public float c;
    public float d;

    public bool showText;
    public int Bat;

    public GameObject Flight;
    public int mainBat;

    public bool safeRemove;

    void Start()
    {
        showText = false;
    }

	void OnTriggerStay(Collider other)
    {
        showText = true;
        if (!safeRemove)
        {
            if (Input.GetKeyUp(KeyCode.E))
            {
                mainBat = Flight.GetComponent<flashlight>().batLevel;
                Bat = 100;
                Flight.GetComponent<flashlight>().batLevel = Bat += mainBat;
                safeRemove = true;

                if (safeRemove)
                {
                    Destroy(this.gameObject);
                }
            }
        }
    }

    void OnTriggerExit(Collider other)
    {
        showText = false;
    }

    void OnGUI()
    {
        if (showText)
        {
            GUI.Box(new Rect(Screen.width / 2.55f, Screen.height / 124.98f, Screen.width / 3.78f, Screen.height / 16.1f), "Press 'E' to pickup");
        }
    }

}

Here’s an image of the profiler

[tom_coursow]

I guess it’s not related to “looking at” the gameobject.
The gameobject has a trigger stay Method (which gets called ever frame if there is a collision) in which you call GetComponent multiple times.
GetComponent is a expensive operation.
You might want to save flashlight OnStart() to a class variable and access this there instead of using get component.