Optimise for long time running on Android

Unity Engine
1

Hi everybody, I am quickly making an app on Android, using unity, but I have a problem, that my application must run during a long time, more than an hour eventually ! And I do not want my phone to lose too much battery and get warm !
So I need to optimize my app, but I need you to show me how I could do it.

This is my code :

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


public class Timer : MonoBehaviour {

    private float holdTime = 0.075f;
    private float acumTime = 0;
   

    public Image hourGlassUp;
    public Image hourGlassDown;

    public Text timerText;   
    public float startTime;
    public float countTime;
    public float ratio;

    void Start () {
        timerText = GetComponent<Text>();
        if(Application.loadedLevel == 1)
        {
            startTime = PlayerPrefs.GetInt("workTime");
        }else if(Application.loadedLevel == 2)
        {
            startTime = PlayerPrefs.GetInt("pauseTime");
        }
        countTime = startTime;
   
    }
   

    void Update () {
        if(countTime > 0)
        {
        countTime -= Time.deltaTime;
       
        ratio = countTime / startTime;
        float t = countTime;
        hourGlassUp.fillAmount = ratio;
        hourGlassDown.fillAmount = 1-ratio;
        string minutes = ((int) t /60).ToString();
        string seconds = ( t % 60).ToString("f0");
        timerText.text = minutes + ":" + seconds;
        }else{
        timerText.color = Color.red;
        }

        if (Input.GetKeyDown(KeyCode.Escape))
            Application.LoadLevel(0);

        if(Input.GetTouch(0).tapCount == 2 & startTime-countTime > 0.5)
        {
            if(Application.loadedLevel == 1)
            {
                Application.LoadLevel(2);
            }else if(Application.loadedLevel == 2)
            {
                Application.LoadLevel(1);
            }
        }

        if(Input.touchCount > 0)
        {
            acumTime += Input.GetTouch(0).deltaTime;
           
            if(acumTime >= holdTime)
            {
                if(Input.GetTouch(0).phase == TouchPhase.Ended)
                {
                    acumTime = 0;
                    Application.LoadLevel(0);
                }

            }
           
            if(Input.GetTouch(0).phase == TouchPhase.Ended)
            {
                acumTime = 0;
            }
        }
    }
}

PS : I have an idea already, maybe “update” not once per frame like the Update function do, but once per second ? But I do not really know how to do… Do you think that easily realizable and can really make a difference ?

2

I would not expect this script to affect battery usage much. Simply just rendering a frame will use orders of magnitudes more power. Reducing the frame rate is probably a much more efficient way to reduce power consumption.

3

Thank you guy, if someone have a better way i’m interrest !

4

Small optimization would be to use string.Format and hardcoded string values on line 45 to reduce garbage collection, also using a Coroutine and only updating once per second would help.

5

its just micro optimizations though, and wont effect the power consumption of heat on the device, he really just wants to lock it to a lower framerate which should be doable via Application.targetFrameRate

1 Like