Unity3D: FramePerSecond for UILabel of NGUI

HUDFPS.cs

using UnityEngine;
using System.Collections;
 
public class HUDFPS : MonoBehaviour {
 
    // Attach this to a UILabel to make a frames/second indicator.
    //
    // It calculates frames/second over each updateInterval,
    // so the display does not keep changing wildly.
    //
    // It is also fairly accurate at very low FPS counts (<10).
    // We do this not by simply counting frames per interval, but
    // by accumulating FPS for each frame. This way we end up with
    // correct overall FPS even if the interval renders something like
    // 5.5 frames.
     
    public float updateInterval = 0.5F;
     
    private float accum   = 0; // FPS accumulated over the interval
    private int   frames  = 0; // Frames drawn over the interval
    private float timeleft;    // Left time for current interval
    private UILabel label;
    
    void Awake() {
        Application.targetFrameRate = 60;
        label = gameObject.GetComponent<UILabel>();
    }
     
    void Start() {
        if( !label ) {
            Debug.Log("UtilityFramesPerSecond needs a UILabel component of NGUI!");
            enabled = false;
            return;
        }
        timeleft = updateInterval;
    }
     
    void Update() {
        timeleft -= Time.deltaTime;
        accum += Time.timeScale/Time.deltaTime;
        ++frames;
     
        // Interval ended - update GUI text and start new interval
        if( timeleft <= 0.0 ) {
            // display two fractional digits (f2 format)
            float fps = accum/frames;
            string format = System.String.Format("{0:F2}",fps);
            label.text = format;
        
            timeleft = updateInterval;
            accum = 0.0F;
            frames = 0;
        }
    }
}