Unity3D FPS Counter

using UnityEngine;
using UnityEngine.UI;
/// <summary>
/// Created by JustPrototype
/// Prototyping.bplaced.net
/// </summary>
public class FPSCounter : MonoBehaviour
{
    public GameObject m_Panel_FPSCounter;// UI IMG for the output
    public float m_updateInterval = 0.5f;
    public bool m_ShowPFS;
    private float m_Accum;
    private int m_Frames;
    private float m_Timeleft;
    private float m_FPS;

    public void Start()
    {
        this.m_Timeleft = this.m_updateInterval;
        this.m_FPS = 30f;
    }

    public void Update()
    {
        this.m_Timeleft -= Time.deltaTime;
        this.m_Accum += Time.timeScale / Time.deltaTime;
        this.m_Frames++;
        if ((double)this.m_Timeleft <= 0.0)
        {
            this.m_FPS = this.m_Accum / (float)this.m_Frames;
            this.m_Timeleft = this.m_updateInterval;
            this.m_Accum = 0f;
            this.m_Frames = 0;
        }
        m_Panel_FPSCounter.GetComponent<Text>().text = "FPS: " + m_FPS.ToString("0");
        this.UpdateGUI();
    }

    private void UpdateGUI()
    {
        if (m_ShowPFS)
            m_Panel_FPSCounter.SetActive(true);
        else
            m_Panel_FPSCounter.SetActive(false);
    }
}