Unity3d DeltaTime

using UnityEngine;

public class DeltaTime : MonoBehaviour
{
    private float deltaTime = 0;
    private float lastFrameTime = 0;
    private static DeltaTime instance;

    void Awake ()
    {
        instance = this;
    }

    void Update ()
    {
        deltaTime = Time.realtimeSinceStartup - lastFrameTime;
        lastFrameTime = Time.realtimeSinceStartup;
    }

    public static float get ()
    {
        return Time.timeScale == 1 ? Time.deltaTime : instance.deltaTime;
    }
}