FPSを数フレームの平均で表示.cs

using UnityEngine;
using UnityEngine.UI;
using System.Collections;

public class FPS : MonoBehaviour {

	Text text;
	int frameCount;
	float prevTime;
	
	void Start () {
		Application.targetFrameRate = 60;

		text = this.GetComponent<Text> ();
	}
	
	void Update () {
		++frameCount;
		float time = Time.realtimeSinceStartup - prevTime;
		
		if (time >= 0.5f) {
			var fpsFloor = Mathf.Floor(frameCount / time);
			text.text = fpsFloor.ToString();

			frameCount = 0;
			prevTime = Time.realtimeSinceStartup;
		}
	}
}